Ask HN: how do you know that you like it?

I have a problem

If you do not want to read everything, here's the big question: how do you know in life, what hobby that you like just outside, not what you'd like to do all your life?

I do not know what I like. More precisely I can not decide. I like web design, I like interesting, well laid out sites that nicely, with good typography, for example, make purchases (in an ideal area for me it is com www.bhphotovideo.com). I know a little bit html and css, a little photoshop. But the point is this. I want to make my own online store. I want a nice, beautiful, fast, convenient online store. I know that once everything is unlikely to succeed, but the dream is to be =) So. I understand that the site that will satisfy me in every way will not make any one studio, and if one that does - is will not available for me financially. It turns out that I have come up design and make your own. But, damn it, I do not know where to start! Pumped a lot of lessons on lynda.com dreamviewer, slowly learning ..

Another point - I do not want make sites all my life. I do not want to be a freelancer. I want to do projects that introduce them to life, and drove off. And I most emphatically is not clear whether or not to learn web design or have any other outlets .. In general, it turns out some unfinished post.

Hackers! Motivate me! Or discourage! Thank you please!

sorry for my english, it is not my native language.