Hey Merlin, welcome!
that is a cool start. During my short education period in drawing, probably 435.789 years ago, I was forced not to use an eraser.
"Think about what you wanna do in advance! Carefully decide the pressure you'll use until you're sure. Show how you found your war to right proportions!"
It helped me a lot to get sovereign in what I drew. It only needs some few painful days and you will recognize this soon.
After a break of 395.678 years in real drawing , I started drawing digital again on almost daily basis. Due to verve and it's magic.
Drawing in other digital program, I quickly start to become this drawing pussy again, afraid of any wrong strokes, having the undo in mind and using it quite often.
That's not the way to become better
My personal experience, sure, some more undo would be cool, but it's not a must.