Programming - What to learn first?

Today decided to turn my old Windows ME computer into a linux-based fileserver. While the results weren't good, I really liked the whole process of writing the codes for the FTP server and so on (I used an old Linux for Dummies book).

I was wondering what the best thing to learn first is if programming is in my potential future? Would it be basic C or html or something else?

I would probably go into database engineering, as it sounds tempting and pays a pretty penny.

I have a paid internship this summer working with a customs brokerage firm in their IT department helping set up computers and networks.

I'm only 15 and I have a few years to learn before college.

Cheers!