A good trick I've found for Gemini or Flow is to create an image you want in Perchance's free character generator. Perchance kind of sucks at making decent looking images, but all you need is a blueprint, and it can crank out a lot of images very quickly. Then use Gemini or Flow to calibrate the image however you want (make it look realistic, change poses, etc). For some reason Gemini and Flow seem to accept images from Perchance better than other sources despite having stuff that might trigger the content blocker. Here's an example: