Look up community-made resources for the language you want to learn. Depends on the language, but you should be able to find plenty of great materials. Without knowing which language you're trying to learn, it's hard to give any better of a generic answer than that.
That said, flashcard apps like Anki are probably the single most powerful tool available, and vocab card decks will be the first thing you see at the top of those community resources. Any reason in particular you're averse to something like that?
It does take some dedicated study to get to a point where you can start to comprehend even the most basic content. If you just start reading/listening from zero, none of it will be comprehensible.
The goal for comprehensible input should be i+1, meaning you understand almost all of a sentence but one word or grammar point, which then allows you to work out the missing piece from context.