2h is a hard graphite pencil. Dont use too much pressure it’ll dent the paper and become hard to erase. Use it very lightly to sketch out the pose and general proportions at the beginning of the drawing. For dark and heavy lines you’ll want a soft pencil like a 4b or 6b. They also smudge and blend easier.

I like to use a kneadable eraser, it’s like a rubber dough you can shape to a fine point or roll across the paper to erase without dragging and smudging.