random ballpen sketches

So i got bored while working and tried some on my sketchbook using a ballpen this time.

The reason why being that my friend once told me do it with a ballpen would help me steady my strokes since i have no room for error (basically you cant erase ballpen marks) so i would be more decisive in my lines. I mean, having tried it i do feel like my strokes have improved a lot more, but i just dont really know if this method actually is doing sth for my skills. Let me know in the comments if you do :)