Hello.

[Vitalijs]

Hello, everyone!
name is Vitalijs, I'm living in Latvia. I'am 16 years old.
I want to know, how to:
1) fast and save burn fat from stomach? (some workout or diet suggestion please)
2) Boxing is hobby, 2 time per week it's normal for teenager like me?
3) Best way how to workout biceps with dumbbell?
4) weight is 65kg on 1.68m, normal overweighted?

Thanks for helping )

P.S. Sorry for awful English knowledge.