[Edit: I didn't reply to OP, sorry... I'll blame my age]
You definitely could start the analog way (up to you). Getting the basics right will go a long way (yadda, yadda, a solid foundation, yadda, yadda, build your skill level up, yadda, yadda).
Any pen/pencil + any solid enough piece of paper, and you'll be ready.
Personally, I would look into learning two things: how to abstract anything (a.k.a. make it into circles, squares, and triangles) and speed drawing of poses (don't start drawing static, stiff, very-detailed figures).
Think on how sculpting starts with a simple shape.
Train your muscles to draw loosely what you see... And then you'll be able to do the same on your drawing device (even if it was a mouse).
Source: I did 3 years of architecture studies and doodle whenever I can.
P.S.: I'm attaching 3 drawings I made during meetings.
P.P.S.: Like any skill, you can develop it
P.P.P.S.: Best of luck in your journey
