I'm an unexperienced user of Inkscape and vector programs in general. Today I started doing my first project, and I'd appreciate some help.
I have a PNG image that I'm trying to vectorize. I followed these instructions and got a fairly decent result. My PNG has only 8 colors, but in order to get them all with the tracing, I had to use 11.
The image bellow shows a zoomed part of my image, after the automatic bitmap tracing.

But what I wanted is something like this:

I achieved the second image with the Bucket Fill Tool, but I believe that's not the correct approach.
I'd like suggestions on how to proceed.
Thank you.