>>939004553
Go to CivitAI, look around the checkpoints.
Select one you like, open its page.
(Download it and set your program to use that for genning.)
Check its description for suggested sampler/cfg/steps/etc.
Open an image from its page and check the right side for the positive and negative prompts, as well as the generation configuration used for that image.
Probably the easiest method to start with. Preferred prompts might differ between checkpoints.