New Painter 2019 User needs advice

Hello All.

I will explain what I am trying to do, and maybe someone can let me know how to do it.

I want to use a brush to clone paint a photo, stroke by stroke. When ever I use a brush, it picks up multiple colors and blends into the photos colors over the entire brushstroke.

This makes the cloned painting look too close to photographic for my project.

I would like to place the brush, have it pick up a single color, cloned from the middle of the brush start location, and paint ONLY with that color until I lift the brush.

I thought un-checking "brush loading" would work, but it didn't.

Any thoughts on how I'd do this?