I acquired Spanish as my third language within a year without studying. Instead I based my learning process on Comprehensible Input and even built a language learning app in the process.
Check out Lenguia: https://www.lenguia.com/
Learn more about the method: https://www.lenguia.com/blog/what-is-comprehensible-input
Twitter: https://twitter.com/tillmusshoff
Join my channel membership to support my work:
https://www.youtube.com/channel/UCycGV6fAhD_-7GPmCkkESdw/join
Stephen Krashen on Language Acquisition: https://www.youtube.com/watch?v=NiTsduRreug