Buying digital drawing tools before you have the fundamentals nailed is a bad idea.
For anyone reading this who wants to learn how to draw: look up dynamic sketching, it’s a method that was developed by Norm Schureman at Art Center in LA in the 90s, targeted to getting product design students quickly up to speed. It’s very analytical and works well with engineer-brained people in my experience.
It’s mostly carried by Peter Han, a former student of his, these days, you can easily find resources online.