I can echo many of the things my fellow bass players have already said so well.
Being overwhelmed with “all you MUST know to be a bass player”. You must know the fretboard completely; the seemingly endless scales (there is not just one minor scale there are a few), but oh there are modes, too; you gotta learn jazz and music theory, and slap, and tapping, and harmonics and ear training and making up your own bass lines and…
Lack of direction. What do I study next? Where do I go? Which online trainer do I listen to, as sometimes they contradict each other as the ‘proper’ way.
Time. Meaning, how much time have I spent watching bass videos that are NOT helpful. Because you can play doesn’t mean you can teach, or even explain something well.
The lack of advanced beginner or almost intermediate training. Josh’s course is the best for a beginner. But there is nothing else out there like it.
Many of the videos out there that make claims of “easy bass chords”, or “learn to create bass lines in minutes”, don’t do that.
Many videos, frustratingly enough, are not teaching or really explaining anything, and would more appropriately titled “watch me play and see how good I am”.
I think some people are so good and so advanced, they cannot teach things on a level that beginners, or advanced beginners, would understand or be able to encorporate into their playing. For example: modes. Countless videos will say, using the C major scale, you just then go D to D, then E to E, etc. Umm…that just doesn’t translate into how and when and where to use them, or why and have made me like modes as much as I like math word problems.
Many free videos are really " buy my product".
Whew!