Anyone with photoshop / image editing skills?

I'm kicking around some ideas for paint / cerakote jobs on a couple rifles and accessories. I can't really visualize them well, especially when it comes to small parts and contrasting colors. I've tried using some photo editing software to do this myself but it looks like a child drew on a picture with a marker 😂

Anyone out there in the community have decent photo editing skills? I'm mainly just wanting to swap colors on an existing rifle, not have someone photoshop in new parts. Doesn't necessarily have to be free either.