I decided to finally try making a LoRA with the on-site generator, and it seems to work pretty well. Trained on 20 images.
Best practices (I've found so far):
Use CyberRealistic Pony v6.2 (6.3 doesn't listen very well)
CFG 7
ADetailer is a must (face_yolo8n)
Adding "(green eyes:0.4), hazel eyes" seems to get as close to her actual eye color as I could manage. Otherwise, they turn out a little too yellow.
Be sure to follow Civitai's rules for celebrity gens, and please let me know how I can improve it.