Sorry I didn’t see this thread sooner. I’m a run drills guy and have been for years. I now coach what is probably the best 12U team in Austin, and we drill so much that when we ran early last week and scrimmaged for 10 minutes...my long time kids were legitimately confused. Skeleton offense, I say when a cutter is open, so they have to watch the cut instead of going through the motions. 2 on 2 block to elbow rebounding. Stationary passing around the perimeter for defense rotation drills, man and ball at all times...make the passing as slow as you need to for kids to get in position and add speed and skip passes as they’re ready (they don’t be this year). You can do this for a long time b/c the offense is resting and it’s not zone. We start every practice and game warmup with layup lines then 3 man weave and in this drill there is always an outlet and we always rebound misses and take makes OOB...build good habits. If you’re hoping to score a coaching related half court bucket at the age you’re at now, a clever baseline inbounds is your best chance.
I ran really specific set pass stuff at 9 and 10 years old, then went 5 out motion last year which we still run. At your age, just drill the hell out of fundamentals while making it as fun as possible.
Broadly speaking, we work on improving skills and making good habits in practice and we only really play live basketball in games.