Suggestions to train a ZIT LoRA

Hello! I am trying to train multiple character LoRAs for ZIT using Runpod's serverless endpoints (using Ostris/AI-toolkit). So far I managed to make it work and I can train them remotely. My questions goes towards the parameters that should be used for a real person LoRA such as steps, learning rate, caption dropout rate, resolution list (for final images that will be (832 × 1216), etc. I am currently using 2000 steps for 15 images on an RTX 5090 and while the character is somewhat respected, sometimes the face looks a bit "plasticky", and tattoos are not always respected.