Need some advices.

I would say read a beginners guide to league of legends, i learnt the hard way with league being my first moba just by spamming games and losing a lot.

[Only registered and activated users can see links. Click Here To Register...] is a pretty in depth beginners guide I've found which may be helpful.

The champs for begginers are : Annie and master yi and jax and nunu and kayle cheap and easy champs.
try using lolking.com for builds and masteries
and watch youtube vids for the champs that i listed and also some videos about last hitting and objectives :D and good luck

try joining a teamspeak community, you usually find more players (willing to halp) there