How would new player approach learning/improving in Supervive?

I played this game before but less than 10 hours. So pretty much new player, I just know some characters and understand basics of how game operates. But I really want to improve as much as I can. Does community have general understanding on how to rapidly improve at the game?

Coming from lol general advice is to OTP one champion and one role, learn the basics of the role, improve farm and fight as much as possible to understand your limits. Not arguing for it being true, but it is what gets recommended for players with such mindset.

So more closed questions:
- Is it worth to OTP, which champions would you recommend for player who loves to duel/dps. Maybe some beginner characters to play solo (like malz from lol)
- Can you recommend some general guide to understand gameplan on how to win more? Like should I focus on farm, or capturing bases, objects? I feel completely lost most times
- What should I focus on while improving, what would be my key metric to check if I am doing good or bad. Is it just generally XP on some points of the game?

Hope to follow up on this post later when using all recommendations