Flux klein 9b Comic Character Lora?

I like the comic style art that can already be achieved with Flux Klein 9B. So that my described character does not always have different hair, jewelry and a different pattern in his pants, I would like to train a Lora in comic style. I tried the Fast Trainer at Fal.ai with 30 ref Images but it doesn't work. It had no effect. While I used to train pure faces as a realistic Lora with flux.de, I expect my comic Lora to correctly depict both the face and the clothing of the character, no matter what I prompt with Lora.