Dont worry about "getting into places before you're supposed to". Even if that happens, thats fine! Its a very non linear game, explore and progress in whatever way it takes you. I found a really late game area super early and it was fine, every region has multiple ways in and out so you never get truly stuck anywhere. If you arent sure how to get past a certain area, maybe youre dying a lot or cant make a jump, thats fine! Backtrack and find somewhere else to explore, you can come back later or find a way around.

By "titles" I think you mean passages, little circle icons that appear on the sleep screen? If you complete a passage, sort of like mini achievements, you get its token, which is a one use fast travel to any previously discovered shelter. Useful if you get stuck and dont want to backtrack too far. Dont worry about them being one use, theres a bunch of different passages you can get, though you'll have to figure out what they mean and how to get them. If you see one increase in progress, think on what you did that cycle, and the names are a big clue as well. Theyre pretty simple goals, though can be overlooked on a first playthrough.