Need advice on buying a Nintendo Switch + games

1. Since it rarely ever goes on sale, any time.
2. Depends on where you live. Most countries have price aggregation sites for most anything sold on the internet legally.
3. Pro controller.
4. Personal preference. If you are into Day 0 purchases, physical tends to be unlocked faster.
5. I do not know of any.
6. Make sure to get Bayonetta 2.

1. Whenever you find a good discount.
2. I just look out for deal notifications on major gaming news sites. That's how I found mine for just over $200, not long after launch.
3. It comes with everything you need really. You may consider grabbing a screen protector and a carrying case for travel protection.
4. I would say physical. The console has very limited storage space, so physical helps conserve that. Although, you can always add more storage with a microSD card later on if you decide to go digital.
5. You can look here for variations. To the best of my knowledge, all the models are the same aside from color.

Other advice: Breath of the Wild should be your first game purchase.

I have no idea but you might wanna add where you live in your post for people to help you.

best time to buy would be after the new switch is released

Only thing I'll add is never get a first gen model. They have problems with docking to TVs generally. though if you are lucky, they tend to be cheaper because you are getting a secondhand(Usually). Someone I know had that problem and 'repairing' would have costing him an extra $180 to get it 'fixed'.

AFAIK Nintendo (first party) stuff doesn’t go on sale often. So buy anytime. I just recently got a switch myself and I feel digital is the way to go. It’s just more convenient than swapping the cartridge, and at least where I live a 128gb microsd card was $20. You could probably even find cheaper. I wouldn’t worry about storage, the system had 32 gb and Mario Kart (currently my only digital title) is 7 gigs. With a sd card you’ll be totally fine. As far as accessories, I’d suggest a Pro and or GameCube controller. Perhaps another set of joycons as well. I’ve seen little controller shaped holders for single joycons that are cool but not really necessary imo.

The only advice I can give is not to buy one for now.
There aren't many games worth playing that aren't also for the pc/other consoles. Most of the exclusives are fun games, but not worth the price of the console (and the 60-70$ price tag).
Just wait when a lot of new exclusives come out and buy it in the lowest price possible, since nintendo will probably make a switch 2.0 and the old one will drop in price.

Maybe you should wait for the slim version, apparently "is coming".
The only extra stuff you'll need is a micro sd card for storage if you buy digital or some physical games that require external storage, like Doom and LA Noire.

Can't answer the other ones, but for the 4th one: Breath of the Wild. Best Zelda game I've ever played (And I have played basically 80% of them). Also, recommend buying Smash Bros Ultimate, i'm having a lot of fun, and it's great to play with friends!

The only tip i leave you is to buy the "normal" micro sd from sandisk and not the "nintendo switch sandisk official sdcards", they are exacly the same but the box is different so +10-20$ you'll pay for the "official"

I'm using the Switch without any accessory and from what I've seen there's not a really must-have, joy-cons are fun and confortable if your hands aren't too big but I guess the pro controller it's a good purchase since it works on Steam too (I've read). I personally like physical games but if you don't like having boxes or cartridges around it's better to buy digital for which you'll most likely need a high capacity mSD card. While prices are almost always the same for physical and digital, digital purchases give way more Gold points that you can use to buy other games and if the game is more than one year old, physical copies won't give any point as they expire.

I just bought mine, so let me give you some advice:

1. It never goes on sale, but you can do what I did an buy a second-hand Switch. I paid ~150 with Mario Odyssey. Just do some research before buying one.
2. Nintendo Switch Deals is great for digital and to get physical copies if you're from the US. If you wanna buy digital always check this site. The switch has no region locks, so buy where it's cheaper.
3. A screen protector. The dock sucks. It is made out of cheap plastic and it scratches both sides of the screen. Maybe a controller, if you wanna play Smash or Splatoon 2 competitively. People talk about SD card, but if you don't buy digital games very often, it's not needed. I got a thumb grip because I find it a bit small for my hands.
4. I buy digital when it's cheap (got Mario + Rabbids for $18) or I plan to keep playing the game for a very long time. When I just wanna beat the story, I get a physical copy in order to sell/trade after I'm done with it. Nintendo games don't lose value. If you buy them for $60, you can always sell them for $40-55, even years after release.
5. No

Get Breath of the Wild. It's an amazing open world game. Definitely one of the best games I've ever played. Mario Odyssey is a lot of fun as well. I also enjoyed Mario + Rabbids a lot more than expected. I haven't finished Octopath Traveller yet, but it's been REALLY good so far.

If you love RPG and Manga, you must try Xenoblade Chronicles 2.

I don't know for US, but in France, Amazon have the lowest price for physical version of game (most of time it even cheaper than nintendo eshop digital version)