>>2846577I think if you're just getting started, use Forge and an XL model right off the bat. 1.5 is a different learning curve.
If you really just got started and maybe haven't done much other than generate your first couple images, there are noob guides in the FAQ that go over a few of the basic concepts. Some of the stuff is a bit dated because they were made for 1.5 but there are still concepts like img2img basics that apply universally.