[pheelicks]

You say that you start "building things" but can never finish. This is normal, we all do it - we start coding on something, it's totally awesome for a couple of hours and then when we come back to it the next day we can't be bothered.

Perseverance is hard, but there's no shortcut around this. To make yourself feel worthwhile & motivated you will just have to finish something. It doesn't have to be the next facebook etc... just get something done.

If you can't thin of ideas, ask people around you what they'd like to have in their life.

You mention Android as a tech you'd like to learn. Surely you know someone with an Android phone. Ask them what they'd like you to build and then build it. Do not stop until they are happy.

Doing this is well within your reach, you know Java - and there is a wealth of info on the net.