Best in the mid lane. His strengths would be his mobility and the amount of damage he's capable of doing. His weaknesses are his super early levels and his ability to wave clear (while opponents are around anyway).
I'd say go for it. He's arguably one of the more fun mid champions and he's pretty strong.
Get dumpstered. LoL/Steam: xRustySpoon Follow these tips and you'll be fraggin' like a pro.
If you just started the game he's not a champ I recommend. That being said if you understand what the majority of other champions do and when using his dodge would be a good idea he is a very fun champ. Also for learning him use 9/21/0 masteries and a mostly AP runepage although I prefer a movespeed quint with him.
You build Fizz glass cannon. Don't just use your E as a way to disengage. You ideally want to E onto them, avoiding a spell in the progress. Hit them, Autoattack them a bit, then manuever behind them and Q them. The Q will put you a set distance back towards your turret then.
Idealism is seeing potential. Pragmatism is seeing consequences.