Okay I'm looking for free, and Stable Diffusion is the main one I have found,but had poor results with. Probably my prompts.

problem with "free" it's often CDN cloudflared or google. I'm surprised to hear you're having a hard time. I used adobe firefly, and pixlar? but now I use Canva.com(you can create a free account) all good results.

Here's a few prompts to try..sometimes it helps to be VERY specific ❤An underwater forest where bioluminescent creatures illuminate the darkness; flowers emerge above water❤Nebula milkshake sparkle hi-res made out of colorful nebulas and sparkles❤in a realm of pure imagination, a steampunk cityscape unfolds, where clockwork marvels coexist with floating gardens and airships glide amidst cascading waterfalls❤