>>7647464 (OP)You're not gonna like this but here goes.
Being able to match color, and being able to maintain proportion, are skills that one develops after lots of practice. So for experienced artists it will really seem like just putting the right color in the right place. They may not realize this advice is useless for beginners.
So finding the correct things to practice is essential.
Do color matching excercises, paint and draw from reference a lot. This is where the benefits of an actual teacher come in but many of us have to figure it out ourselves.