How I should be able to kill enemies and level up (noob)

[AstroNautti]

I like the mod idea, but it's almost impossible to do anything as a noob. I wonder how you can level up in this game? I guess only viable option is to stay back and do basically nothing and get support xp?

ps. What level I should be at least, so that my character can be any useful in fights? Now I can make like maybe one kill per game.