I think color choice in quilting is much more difficult than anywhere else. There are so many variables in color choice: style, pattern,
light/ dark, dull/ bright, size, shape.. to name a few. It will make you crazy but you can learn and study it and progress but it takes time. I still work at it.
I started out with colors that I liked naturally and then "trialed and errored" it by putting them up next to each other. I tried to adjust the size of the fabric when I do this. I asked the local quilt shop people. It took me a long time.
go easy on yourself and pick what you like as a focus.. go from there. It's a process and takes time