Best thing I ever did was learn to read.
I got through the first 20 years of playing without, then started to play with my kids who were getting lessons on clarinet and sax.
Learning to read loads of different stuff when those 2 instruments transpose differently was a real development point for me. So many more pieces of music are now accessible. If there's no bass part then the trombone or the bass clef part of a piano score is all there.
It also allows me to properly play stuff from different arrangers. The Hal leonard library stuff has multiple versions of the same tune but arranged differently. Different styles come through even more that way.
If you read at all (only Grade 2-3 level) then there is loads of HL stuff on youtube where the entire score is on screen and flips as needed. If you watch it on a big enough screen you can read it straight from the telly.
Here's an easy big band arrangement of "Think" - the bass part is nearer the bottom
With Youtube's speed controls it can be played back really slowly while maintaining pitch. It's great for learning.
There's loads of similar stuff on youtube, as well as loads of No-Bass backing tracks in a variety of keys / styles / tempos / time sigs.
Like this