What to do if you're just semi-technical?

Everyone tells me this is a blessing, but it feels like a curse. I enjoy writing code and the world of software, but I'm by no means an accomplished or brilliant developer. I can hack my way around some HTML/CSS and JavaScript, but I couldn't deploy anything more than a single-page application. I also enjoy music, acting, singing... but I don't think I was born for the world of the arts. I want to make a real impact through technology, and the things I care about are problems that can probably only be solved with computers and money. Georgia Tech pushed me to be so specialized that I quickly changed my original major (Chemical and Biomolecular Engineering... I was a chemistry whiz in high school) to International Affairs, but even there I didn't find happiness, so I eventually dropped out of school. I've had some jobs I enjoy, but none of them that really thrilled me. My favorite job was probably the year I worked at Apple retail in college, because I got