Clozemaster is absolutely phenomenal. I’ve been using it for Mandarin and (primarily) Greek the last few years. It has sets with the most common words of the language (100, 500, 1000, 2000, 5000 etc) and you get to learn them by filling in the words inside sentences. It doesn’t teach you any grammar though, it’s only for building up vocabulary.

For Greek, I used language transfer to get the basics and the grammar. It’s a great resource, though there aren’t that many courses: https://www.languagetransfer.org/free-courses-1

Dragon Ball manga in Spanish. I’m already familiar with the story in my native language, so when I see words that I don’t understand, I can usually guess based on the context of the story. It also helps that everything is visual.

Manga is better than anime/video because I can read it as slowly as I prefer.

Pimsleur got me speaking French pretty fluidly and with almost no accent very quickly. I haven’t studied much in any other language but I’m super loyal to Pimsleur now and when I decide I want to learn another language consistently, I will be using Pimsleur for speaking.

I would love to get suggestions for Japanese resources / apps

I have done a month of Duolingo and I am sick of hearing Ken ask for sushi every lesson!