Software developer that knows nothing about ML: What would it take to mess around with this?

From a skim of the README it seems like install the package, and then find some training dataset, and then ??? to use it.

If you have a decent amount of VRAM, you can use it to start generating images with their pre-trained models. They're nowhere near as impressive as DALL-E 2, but they're still pretty damn cool. I don't know what the exact memory requirements are, but I've gotten it to run on a 1080 TI with 11gb.

EDIT: I also tried a 980 with 4GB of RAM a while back, but that failed...so you probably need more than that.