I started at SBL, moved to BassBuzz, then TalkingBass, also did Charles and started today “playbass” by Musora(Drumeo, etc)
Pathwise… I think:
BassBuzz - TalkingBass - SBL / Charles.
Playbass as I said, started today, so I can’t give an opinion just yet, but if they keep the quality that they have in Drumeo / Guitareo / etc, it will be good. (Subscription)
If you want Theory, Groove Training, Ear Training, I’d go TalkingBass. Course are permanent and frequently @markjsmith does sales. His last finished yesterday. (You pay per course and keep it for life)
I am doing Theory / ear training on TalkingBass… and I can’t complain at all, been learning a lot, although Ear Training is messing with my brain, but that’s a me problem.
SBL when I was subbed to it, was not beginner friendly and I did not have a positive experience, that doesn’t mean they do a bad job, they just cater to a different audience. They revamped some stuff recently and I think @joergkutter is subbed and may give you more feedback on how it is now, as I believe they sorted that gap. (Subscription)
Charles, his course is doable, but it’s not very beginner friendly and while he is very talented, he isn’t the best at teaching, you’ll find it awkward coming from BassBuzz or TalkingBass. I only have the beginner course, not the mastering the masters. The later might be on the harder side, based on what I saw in the Beginner one. It’s also a permanent course.
As @MikeC suggested, I’d follow up with Musical Theory course as you continue practicing and getting mileage under the fingers.