Alway remember there is also "Club Tennis" in college. If your school doesn't have a team, you could start one.
Club tennis might be a better fit for you, less demanding of your study time, but just as competitive.
Anyhow, glad to see you want to continue playing while in college!
I'll throw my 2 cents in there as well.
Club tennis is a ton of fun! Most (if not all) major universities, and smaller ones, have club tennis teams.
The time commitment can be whatever you want it to be, whether you still wanna keep playing after high school or even just learn the game itself.
You'll find that the competition in club tennis is most likely tougher than high school. Also, depending on which school you go to, they will probably give their respective club tennis teams money for travel expenses, equipment, etc.
It's usually not a lot, but it helps, so you may or may not do fundraising.
The NTRP for club tennis players usually ranges from 3.0-5.0ish. It just depends. I can say the club team I play on has two 4.5-level players, and a handful of 4.0s. After that, we have a bunch of 3.5s and some 3.0s. These are just estimates, by the way. You get the idea.
At any rate, it's a good time!