[adverbly]

If you always liked learning stuff but don't have any time, find out how to get more time. Time is the only truly finite resource so getting more is always worthwhile.

As far as happiness is concerned, I'd read the paper causes and correlates of happiness. Make sure you address the most significant areas. If you already do, you might just have a low generic setpoint. Unfortunately genetics have a lot to do with intrinsic happiness. Not much you can do the beyond medication.

And far as social interaction goes, your best bet is to find a pre-existing social group with a shared interest. Building a community is hard but thankfully plenty of other people have already put in the hard work.

[temporallobe]

Yep, you can always figure out a way to make money, but you can never make time. There's probably a clear song lyric in there somewhere but I can't see it yet.

[grvdrm]

You can ALWAYS make time. It's a matter of whether you're disciplined enough to do so.