Really don't need anything to become near fluent today for most languages.
Learned Japanese by reading Manga for like 3 and a half years, self-speaking to myself and watching japs on youtube play games. I was pretty much fluent in everything except pronunciation and then when i went to japan I fixed pronunciation after a long period of time. Just don't take it too seriously it's not like it really matters too much. Most interesting things from japanese are translated (with varying levels of success, mind you) besides like hentai, vns and lns all of which you can go without, lol. Effort is may more important than time in learning a language.
If anyone has any Russian tips/tricks, message me. Really struggling right now and have been going at it for like 4 months.