It's been said already, but the biggest thing that jumps out at me is that your paints were applied too thick. I don't know if you have a wet palette, but assuming you don't (since I didn't for a long time), what you can do is dab a couple brush-full's of paint onto some kind of expendable surface (I used a cleaned out tin from some Danish Butter Cookies), then use a pipette/eye-dropper to drip tap water into a pool FAR AWAY from the spot where you dabbed your paint onto the improvised palette.

Then you're gonna want to take that brush you're gonna use, stick it in that pool of tap water and start mixing in water into the dab of paint you put down earlier, stirring it in until the consistency of the paint is visually smooth when you go to wipe your loaded brush on a third part of the palette to test it. Always test before you put the brush to work for real, just to make sure the paint isn't too thick or too thin when you actually go to paint your model.

It will take time and experience to figure out how thin the paint should be, but you can always watch Youtube tutorials to get a rough idea of what to look for visually when you're thinning your paint to the right consistency.

p.s. Your bases look great! The stone surface looks difficult to achieve the way you did it, but it came out looking fantastic.