I'm honestly mind-blown with the responses on this thread. I really, really appreciate the depth of the answers that some of you have given. It's hard to get this many perspectives from talking to individual mentors (I don't personally know many in aerospace or related fields), and I'm grateful for each of you that took the time to answer.
Tons of great points have been made, and it would take forever to address them all, but I can tell you a little bit more about myself if anyone wants to discuss more.
I'll be starting my sophomore year in Aerospace Engineering in just a few short weeks. Rather than focusing on the school's club rocketry team (small-scale projects, mostly hobby-oriented), which I've been apart of for the last year, I'll be transitioning to our larger lab and their RP-1 LOx rocket slated to fly to the Karman Line in the Spring. While my proficiency was mostly with composite material manufacturing, I want to try and put my time into different topics like TVC or Propulsion that give me the best opportunities to learn as much as possible. Although I have no experience with higher-level projects like these, I know this will allow me to grow as a better learner.
My first-ever round of summer internship applications will be in the next few months. I'm working on building a list of ~35 (?) companies to apply to. The coveted NASA, SpaceX, LM, etc. are obviously on there, as are many other smaller, more realistic opportunities. If there are any in particular that you had a great experience with, I would love to hear about them.
On the topic of books, I recently ordered one that I'm looking forward to starting. It's "The Art of Clear Thinking" by Hasard Lee, who was an Air Force combat pilot and instructor. I randomly found it after seeing one of his videos on the internet, which I highly recommend you watch
here if you're an aviation nerd like me. I hadn't been too keen on reading "life advice" books until lately. Mostly stayed around Philip Kerr and Allan Folsom books passed down from my dad.