It was one course (had a you fail the course if you got a sub 40% on the final) and I was able to rewrite the exam in the summer, loss of structure killed me coming from hs. Was definitely a wake up for me as well, had study groups and roommates in subsequent years which helped me (and unhealthy quantities of caffeine)
Got diagnosed with ADHD around a decade after graduating, which explained pretty much everything looking back.
FiiO has some that aren't super pricey (they run a range, their entry level stuff is usually really affordable), their amps and DACs are pretty solid in my experience so I'd totally look into one, second hand would definitely be an option there too.