With customforge forums being specifically dedicated to CDLC and only marginally on discussions about studying, composing, performing and such, I wonder do you regularly visit other online forums for musicians?

Do you have any good recommendations for bass learners?

I used to visit harmonycentral forums long ago but they are nearly dead nowadays. Also, there was quite too high amount of toxicity for my tastes there.

i think you'd have better luck in discord for finding musicians. I find forums dont tend to have that many active people in general. 
I personally don't know of any discord channels for bass learners since ive never tried / never really interested me. But maybe you'd get a response out of someone in the customs forge channel in discord.