Welcome! My main piece of advice to you is use your package manager and don't just download software from your browser like you would on Windows. Installing software with a command line package manager is the superior way to do it—nothing to do with being a leet hackerman/woman using the terminal, it is just an easier way to keep all your software centrally up to date without having to individually update each one separately, and it's faster to do in the terminal rather than bother with the bloat and slowness of a GUI. Generally, Windows teaches you a lot of bad computer habits you should try to unlearn. I think installing software from the web is the biggest Windows-based mistake I made when new to Linux.

I think more generally learn to use the command line, a lot of things they have guis for (eg burning an iso, mounting or formatting a drive, version control guis, etc) are completely doable from the command line and it's faster and more reliable to just use Unix commands for these things than to rely on a potentially buggy or slow gui program.