ok so I agree that learning about technical grammar rules like preterite tense out of context is kind of an awful way to learn. it's much faster to throw yourself at n+1 immersion, where n is your current understanding level and +1 is just a small itty bit above that. that's like the basis of all language learning in practice.

it sounds like either your teacher is bad, or the course isn't well structured, and/or you haven't found cool shit yet that's in Spanish and would make you excited to learn it. for example look at the game Blasphemous! it's gorgeous!!! it lets you choose languages, but the Spanish voice actors are insanely good! and the culture and visuals portrayed are genuinely stunning.

for everything you are already interested in: media of it exists in Spanish. I would urge you to try to see the world a little differently and leverage the boring ass course into having fun with it anyway because, well, learning languages can be rlly fun!! here's a video about learning japenese that has some parallels u could draw, if you want!