If you buy a movie, you are buying the rights to private use of the movie, you aren’t buying the copyright. You can sell a DVD movie to someone else and it’s not illegal and doesn’t subject you to copyright law.
If you buy a game that has a license key, then yeah, you are buying a license to the game even if it has physical media, but buying a physical copy of an Xbox game doesn’t have a license key (well, more recently they do, the box contains a store key instead of a disc, but before that was common practice)
Elden ring was my first souls game and I kept away from fan sites and youtube videos as much as possible until I beat the final boss. Didn’t want to tempt finding a meta build.
If I needed help, I asked friends. It was a great experience!