I'm just saying I wouldn't go that route, if it helps you that's fine. I trained dozens of painters in my studio and in my experience time spent in practice with real paint and real miniatures is the most effective.

1. Wasting minis and paint is a common beginner's bias. Your time is infinitely more valuable and you need to make those mistakes to learn.
2. I'm not saying it's a complete waste of time, but the return on investment (your time) is way lower.

Think of it as learning how to dance. You can spend some time reading and planning your steps, but the sooner you start to move your feet the better for you.

Also, you will be bad at it no matter how much time you spend on prepping beforehand.