There are lots of resources on the forum, you can try using the forum search engine, or use Google search if you want to look for a specific topic just add the keywords “bitcointalk” in your search.

Outside the forum, I recommend watching Andreas Antonopoulos videos on YouTube - https://www.youtube.com/playlist?list=PLPQwGV1aLnTuN6kdNWlElfr2tzigB9Nnj

If you like reading books, Andreas Antonopoulos book Mastering Bitcoin is a must read.