Doom & Destiny and Doom & Destiny Advanced with 90% discount on Steam

As I recall, D&DA is considered a reboot of the original (rather than a sequel), with expanded class options, original art [versus RPGMaker standard art], and similar updates. I believe the only overlaps with the original game are some light nods to the first game. Conversely, the narrative is redone for D&DA and seems to be considered as being worse than the original game.

As for D&DW, I believe that's set in the same setting, but has no overlaps beyond that, being a co-op survival game(?) spinoff of the main game and its reboot. It's also a DLC-based game, so do make sure to consider those (and the additional costs they bring) before considering D&DW.

So in theory, assuming I recall everything right (and it's been ages since these games were [eg, bundle] relevant here on SG, so take it with a pinch of salt), there's no meaningful connection between any of the games. That said, the first game is much better considered than the latter two, so it's more recommendable to begin with, meaning that you'd likely want to start there anyway (and then check the reviews for each subsequent game to look for specific differences from the first game, and see if they're ones you'd consider game-ruining).

On the other hand, one should note that D&D is from back in the day when we were starved for RPG content on Steam and casual RPGMaker games got treated a lot more favorably than they do now, so it's hard to say (as someone who hasn't played the games) how well its positive reviews have actually aged. Especially so given that it's considered a very standard/grindy JRPG in its gameplay, and doesn't seem to have done anything especially innovative in breaking from the default RPGMaker framework (as many, many other RPGMaker games have done), and seems to have the same single annoying music track for every single combat.

It may help to look up some gameplay videos and take a look specifically at the more recent reviews for the game(s), before deciding on getting any of the games.