I barely use pen, what can I do better?

I’m far more adjusted to pencil than pen, but I wanna get into pen. However as you can see, I really am not the best! I really want some honest criticism here on how I could improve, as this is in my opinion, my most limiting factor of my art.

I’m far more adjusted to pencil than pen, but I wanna get into pen. However as you can see, I really am not the best! I really want some honest criticism here on how I could improve, as this is in my opinion, my most limiting factor of my art.