I play bass! I've only been playing since mid december but I think I've made a lot of good progress so far. Being able to lock in with the groove of a song is so much fun, physically feeling the music is so different from just passive listening.
It can be easy to get discouraged when you have access to so many recordings of skilled musicians these days, try not to let it get you down, everyone starts somewhere! I don't know if this helps but I try to look to recordings as a sort of goal to work towards. Instead of getting discouraged I find myself motivated to keep working hard to reach the proficiency of the recording.
I also love learning music by ear, it's challenging but really rewarding. I get to hear all these tiny nuances when transcribing that I wouldn't hear otherwise. Here's part of a bassline that I transcribed recently: https://vocaroo.com/i/s0cY7lAwVTTQ