Am I over romanticising of my future in the field of Computer Science/Programming?

So I've decided on a degree of Compsci, and hopefully will be starting next year.

The thing that stood out of CompSci was the staggering number of options one could go into, from my POV (ones appealing to me): - Game Development (Indies) - Web Dev/Design (websites, web apps etc) - Data managing/collecting (a fusion of this and web dev would be sick) - Software (solutions, new products etc) - Machine learning/AI

I know CompSci degrees don't necessarily teach all these, but I plan to self study whilst in uni/college.

Thing is, during my 3 year run is this a bit too much? I have intense interest right now, simply can't wait, but stuck until graduation.

70-100hr work weeks is what I'm planning, I'd be learning web design/dev first so I can work freelance to pay off college/uni fees.

Am I romanticist about this way too much?

After graduation I want to work for a possibly industry changing (slightly) company (IBM's watson) or possibly launch my own startup (after I validate some of my ideas).