Post some, I want to see>>5646058
Unironically, OP, try Inktober.
Like most anons on the thread, the thing is not to be absolutely free, but the opposite: Have boundaries, and do whatever you can within them.
1 piece a day, so don't overextend on long stuff.
One topic, some of them are pretty abstract, do whatever feels like it would represent that topic.
Some will be really specific, try to to anything related to the topic, but not the absolute obvious, and see what you can come up with.