Of course you can, if you're motivated and talented enough.
I say "talented enough", cause I don't know what your goals are... But of course, people who start playing the piano at a very young age, obviously have an advantage with that to develop themselves into great pianist's.
I'd say: find a good teacher, practice a lot and if you're motivated enough, you'll sure be a good pianist someday. Also, I must notice that an age of 17 isn't that old to start playing the piano.