Wiktionary
too many balls in the air
n. (context idiomatic English) Too many tasks, responsibility, or details to cope with or manage successfully.
Usage examples of "too many balls in the air".
Before she could look to find a wound he had control of the vision once again, but like a juggler attempting to hold too many balls in the air catching one meant losing another.
By diversifying, you become a juggler trying to keep too many balls in the air all at once.
While she was doing that, she felt like a juggler with too many balls in the air.
The Beast Lord would become a juggler with too many balls in the air and have nothing left for defense when magic started to fly.