Just as Scott mentioned in his comment, this takes years of practice. Many people seem to think everything art related is pure talent - or a great part of it. The most frustrating thing for people who try to learn how to draw or paint is that their results don't look like they imagined, or like the reference they had. That leads to them quiting relatively quickly, thinking "I don't have the talent that is needed for this.", which is not the case. Drawing is a learnable skill, that consumes alot of time.
Here are some basic tips that do not only apply to drawing:
Break it up
Break your Problems up into solvable pieces. A finished illustration is very rarely just started by picking up a pencil and drawing it in one go. You will nearly always have several rough sketches a refined one , an underpainting and then a rendered illustration. The more you practice the more of these steps may be skippable.
Don't try to draw a hand position from memory if you are not familiar with anatomy, use some reference - from life is prefered, photos will be perfect too, it's not cheating, its necessary. The more you draw the less reference you will need.
Learn the fundamentals
This is the most time consuming but the most significant point. To draw convincingly you will need to learn about:
Start with simple shapes, put these shapes into perspective, combine shapes to complex forms ...
The medium is secondary
You will of course need to practive with a new medium and the same as before applies here - the more you do the better you get, but every single point above is more important than the medium. Digital has the advantage that you can do a lot of practive without consuming the medium. But you also tend to
undo your mistakes which - in my opinion leads to a worse learning curve.
As most other skills, your drawing skill will get rusty if you don't draw regularly. Try to draw everyday even if you dont feel like it. Carry a sketchbook and a pencil with you at all times. The better you are the less significant this gets. Draw something that is fun every now and then.
A certain style is just the icing on the cake and always has its foundation in the fundamentals.