I've made a tracing of the major design and that's now a "carbon" being transferred to each marked place. Every two or three tracings, flip the paper over and you'll have a brand new "carbon" to keep right on going.
On a "real" carving I never make make any lines or tracings this dark .... I make everyting as gently and as light as possible.
Having those marks will assure you of a design that is evenly spaced. Good old graph paper.
I use the tip of my left index finger as a pallet .. it's close and I can spin the tip of the paint brush to get a perfect tip. (You can see my grand, exclusive pallet on the table.) I'm painting that woodburned design gold and it's as easy as painting in a coloring book

. Metallic paint is so transparent so I painted this with one coat of opaque yellow ocher and now one coat of gold gives great coverage.
Somehow ~sigh~ I left out taking a photo painting all the major designs gold (just needing the outlines in the end so I didn't use the yellow ocher here). I'm painting the inside of each section of the design green.