I decided to test training a lora on Chenkin Noob XL, specifically v0.2. The character is Shikyou from the Story of the Demon and the Kitsune/Onibi Series. My other Onibi Series loras have all been multi-character, but this time I decided to do a single character so it'd be easier to test.
I was impatient so I only trained it for 400 steps, taking only 15 minutes. Even so, the quality is surprisingly decent. You might want to use a higher weight than 1.0 sometimes because of the low step count, but you don't need to. I only tested it with the checkpoint it was trained on.
I recommend using style/artist tags because the default style is quite bland.