First off - you’ve accomplished something big. It’s okay to take a minute to relax and let it sink in before moving on.
What are your goals playing bass? Why do you want to play bass? What are you interested in?
Josh put up a GREAT video that covers this progression, and there is a key part about finding your “Why” starting at around 4:00. (But you should watch the whole thing.)
Let that guide you on your next steps.
You don’t have to work through the list of 50 songs. Those are suggestions, not a fixed progression.
I would spend time learning songs and working on improvising (but not necessarily soloing) to backing tracks.
But what YOU work on and how needs to be guided by YOUR motivations, desires, and goals.