Just be careful of details as they can get lost within the lines if they are too thick. Practice as always and you'll improve and get better at drawing. Some people like rougher while others like more smoother drawings so it varies on good or bad. It's up to you if ya want to continue on it.
I didn't notice before because they are much bigger so the lines don't seem that thick in comparison but Samus is more detailed and smaller so kinda a bigger contrast. They are good beginner drawings.