I’m in a similar boat myself – I believe I want a new career in 3d, however I’m unsure which area/s I want to get into (Thus doing the fundamental courses to find what I like most to start with). I started listening to Andrew Price’s podcast (Blender Guru aka the donut guy). In the first few episodes he discussed learning methods and advice on finding what you are interested in. It isn’t just focused on Blender, but if anything I’ve found it really motivational and encouraging – especially hearing his conversations with industry professionals and enthusiasts.
Look up the Andrew Price Podcast on youtube for the videos versions (however not all of them are on there. The first many are on Spotify at least).
I hope this helps!