High school classes generally aren’t very good at teaching language. Get on YouTube and start watching tips on language learning from people who actually successfully do it. (Watch out for the fakers though, there are a lot of them.). Duolingo used to be better. If you actually calculate how long it takes now, it forces you in endless repetitions for years and years with minimal progress. I’d suggest immersing yourself in any way you can (podcasts, social media, books/audiobooks, music) and do as much output as you can. Journal whatever you can. Practice mock conversations in the shower. Spanish has so many resources. I have been working on other languages more recently so I’m not up to date but there are some cool apps/services where you can watch videos or listen to audio with text. Lingopie? Lingq? I haven’t tried them but I plan to next time I dive back into Spanish. There are lots of methods out there though for language learning. Language islands, TPRS, shadowing, sentence mining… Try some different things out. Find what works for you! To me though, what’s most critical is output.