how do we level ?

By giving away games.

https://www.steamgifts.com/about/faq

Maybe this will help List of all CV Levels and their corresponding Real CV

Crafting SteamGifts badges

Most of us are more than willing to give what advice we're able to, when asked, but it'd be a lot more respectful of you if you attempted to look up the information yourself, first.
Once you've reviewed the FAQ (link at the top of your page, or three comments up) feel free to ask us about any questions you may have. In the meantime, you can close this thread by clicking 'Open' in the top right.

BOARS

But Tzaar answered your question.

I recently posted this thread which might be helpful information in addition to what others have said!

Kill some monsters duh.
You're lvl 0, so you should start with bugs. Go here, create a new topic and find yourself a party.

Thanks to everyone including those salty one ;)

https://www.steamgifts.com/giveaways/new
Keep filling out that form over and over again is how you level up. Make sure to actually give away the games, too.