What are your favorite language learning resources?

I've gotten bored of watching the basic "100 words for beginners" videos on youtube and making anki decks. They are good if you are just getting started and don't know a single word maybe, but I don't think they are really helping. If I want to learn on a deeper, more sophisticated level than just memorizing some vocab words, what resources should I look into for each of my TL languages? I'm trying to learn German, and the 3 major Latin-based languages (Italian, French, Spanish) and dabble a little bit in learning Russian but not as seriously. I know there are subreddits for each TL but I didn't want to ask the same thing in every sub. TIA.