As a developing player, I think it's important to learn a constant stream of new information. However it's also important as a developing player to have opportunities to apply what you learn. In other words you need opportunities to play and be challenged by other musicians. IMHO the process is basically learn, study, apply, review/maintain, learn, study, apply, review/maintain, etc. Over a life time, there are things you will learn, forget, and relearn...that's partly what the review is for.
Ideally you would be surrounded by others who are really interested in exploring music in depth, rather than just copying/playing covers.
What do I do? I typically play over changes while watching TV. I am a retired pro with no intent of ever gigging again...but can't give up bass.
I have been mostly focusing on some of the fast swing standards I used to hate playing. I have been alternating between Oleo and Giant Steps. A few days ago I decide to add Cherokee. The reason I am digging into these now is it gets boring to play less challenging jazz standards by myself

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Some learning goes along with practicing these songs. I never really learned much beyond major and minor scales and the common modes. While working these songs I have been exploring the altered scale, whole tone scale, and Lydian dominant mode. I don't have enough discipline or interest to really hammer the scales, although that would be a good idea if I were hoping to be an actual jazzer.
Something else that goes with practicing these songs is reacquainting myself with upright bass fingering. I recently bought an NS Design EU6, which is about 42" scale. My #1 bass guitar is a Yamaha TRB6P, and I use primarily one finger per fret on bass guitar. So it's two distinctly different fingering systems. I am also exploring thumb posting on the EU6, which is something I never really got around to on upright.
I worked up the melody for Oleo on 6-string bass guitar and play it high on the neck. This involves reading treble cleff and transposing. Also the melody is fast and technically challenging.
I'll probably wind up buying a carved upright and working on my classical technique. Unfortunately there are not a lot of options locally to buy a carved upright, so I will have do do some road trips.
Everyone follows there own path. I majored in music but never dreamed I would be a pro. I had no interest in being a teacher. But I found a path where my unique mix of talents and capabilities was an assett. I am a generalist who prefers playing a wide variety of different music rather than specializing. This made me well suite for a career as a military musician. I played jazz trio, big band, concert band, pop covers, etc. I wasn't exceptional at any of it, but I was competent at all, which made me a valuable asset to the career field.