Again posting not necessarily for OP but for anyone reading this…
I just finished my freshman year and many professors tried to teach us with their specific methods/from scratch, so self-studying could prove to be a total waste. It is completely possible to get a 4.0 without knowing all the subject material. There is a lot to be said for learning specific software/skills; i.e, business majors could learn Excel, journalism major could learn a language, CS major could learn a programming language or two… but just teaching yourself course material, only to relearn it, seems silly. Even if you went this route, it shouldn’t be taking you 40 hours/week.
Second, the resume is big. I assume you want to land the big prestige internships/jobs next year. If I’m looking at your resume, I’m going to ask why you have work experience two summers ago but not last summer. Were you a poor employee and not invited back? Did you simply say “meh, I’d rather sit at home”? Answering with “I was studying for my classes” would signal me as an employer that you are very inefficient, very antisocial, or both. Even if you can pull off an acceptable answer, will you get a good reference from that employer? Imagine the employer calling up your old boss, only to have them say “OP? Hm, OP, OP… oh, yeah! Well, I guess we didn’t fire him, so he was probably fine.”
As for spending money, it pops up everywhere. I had two groups of friends this year… one that liked to spend money, and one that didn’t. I spent significantly more time with the latter because I couldn’t always afford to keep up with the former. Brunch, going out (alcohol, clothes, taxis/Ubers), late night pizza, concerts, sightseeing/weekend travel, going out to eat for someone’s birthday, Spotify/Netflix, extra phone chargers, lost ID cards, a fake ID, when the Girl Scouts post up on campus during finals week and exploit the hell out of us… all things my friends and I spent money on. It is okay to say no to some things for frugality, but as mentioned earlier… if you say no too many times, they will stop asking. And while you obviously don’t need to buy friends, you will want to make friends in the early weeks and if it costs $15 to go to Chipotle or $30 to buy a handle/mixers, it’s probably worth it. Also, any and all things you might not want to ask parents money for… STD testing, birth control, anything illegal, even presents for their birthdays (it stops being cute to buy Mom’s birthday present with dad’s credit card when you’re like, 8).
One last thing, for OP…
Drop the “I’m much smarter and mature than most of the other kids my age act”. You may be smart, but you sound incredibly naive and not self-aware in the slightest. You can of course think you’re smarter, but don’t talk about your peers like they’re peons for not having a 4.0 or being in the Honors program. It’s not cute.