I wish I had NOT GONE DOWN THE MAINFRAME/COBOL ROAD.
Haha... I'm only half serious... I've had a solid career and managed to transition out of Mainframe COBOL "just in time", at the same time capitalizing on a niche demand, so I don't really regret it.
Sounds like you're on a good path. Best advice I can give you is do a lot of website building on your own, in addition to what your schooling demands of you. Nothing substitutes for experience.