I don't know... don't think about anything else and just try to have fun.
When you are having fun, you tend to give better results (and well... since you are enjoying it, it is a win-win situation
).
Also forget about other people's expectations, as you don't have to impress anyone. Just go wild and let the pixels flow.
As corny as it might have sounded, getting that weight off your shoulders makes it easier.
And just keep at it, post here for receiving criticism, challenge yourself, work on projects you like, etc.
But mainly keep at it, because if you have the passion for it, everything will start clicking together eventually.
And uuuh, I started pixelling when I was 16-ish, so that makes it 5 years at it.