Awh, thank you ;w;
So, I rarely draw textures by hand, I don’t enjoy the process or results so I’m just using a lot of noise maps and masks, if any of them is nice I can just render the shader output to the texture and keep it so 
Th texure I was using for the bottom part was just… voronoi 
(from Luos’ pack, I think it was this one, I got it years ago and its been working super well for a lot of things I do at home).
My shader is based on Harry’s VFX Master Shader with some changes and upgrades and all that.
But, to give some details, its a simple quad with polar uvs, circular mask, scrolling voronoi and uv displacement to add some spice, colour is added with a gradient sampling the result of all of that.
Voronoi
This thingie I use for displacement:
And yes, there are some waves! Just a simple mesh with scrolling noise textures.
All elements of the effect on the ground:
I think the second element from left is a good one to show how much uv displacement changes:
Hope that helps, lemme know if you have more questions or want me to explain something better!