Im 16 and I feel useless, Im not hopeless. I just feel that i haven't used any of my potential yet and that I don't know what i should do after today.
Think of your young age as a whole lot of open doors.
1. Welcome to Hubski! I hope you enjoy it here. 2. You have plenty of time to explore a lot of different interests and decide on what you like and don't like. Hell, I don't know what I should tomorrow either.
sounds_sound has a fantastic rule that he lives by that I would suggest to any young person. When he's invited to do something, he always says "yes" unless he truly cannot do it.
You can hear him talk about it here:
I'll give you the advice I wish I was given. Try everything. I mean EVERYTHING. You are at the age for the next 10-15 years where your brain can absorb info in amazing quantities, you can develop muscle memory easily and at least for the next few years your responsibilities are minimal. It may not feel that way, but trust me, unless you are on your own, take advantage now to try anything that looks even slightly interesting. You will never regret trying.