Want to improve in PvP.

I want to improve at PvP badly but i'm not sure were to start I have tried playing PvP but my team always loses and gets pissed off at me. I normally just stick to beginner bots but it gets so boring. And when I do play PvP I play with my lvl 13 friend when i'm lvl 8 would this make a difference to the players I am matched with? Any help will be greatly appreciated.
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