How do you decide what to immerse yourself in? Do you just search for things independently or do you have a way of selecting content based on your level?
I prefer to start immersion at ~B1 level. I know some people want to do comprehensive input right from the start, but I prefer to build foundations.
I start with popular books that I have already read before - The Little Prince, Harry Potter, etc. Then I take books that are interesting for me and work through them.
There are graded readers, but the stories are usually very boring. I prefer to read what I like.