/ic/ - Artwork/Critique

So here is a thing that's been bugging me, while this reference study looks pretty crude and crap, it actually took me over an hour to actually draw both.

The reason was I would make an error, and rather than leave it, I would erase the error until I eventually got the result that looked closest to the reference source...but is this a bad habit to do early on?

Like I keep thinking erasing my errors rather than just leaving them may slow down my growth as an artist. Granted, I am getting far more accurate with my studies (with a 60-75% closeness despite some inferiorities/less detail) but am I actually improving or is it just an illusion?

Also I am thankfully gonna go back to drawing humans for a bit, which will be interesting as I haven't done many in a few days besides hands and legs.