Four tiny head drawing with ball point pen

I see this two amazing ball point pen artist on hive, Hive account@maxwellmarcusart and Hive account@kayda-ventures
these people are so amazing at ballpoint art that their arts made me try to draw some with ball point pen.

I am not comfortable with this because when drawing i erase a lot, to get a good sketch but in this case i wouldn't have any control after i draw. So if i make a wrong line i will have to draw along with it.

So, instead of going big, i just sketched four tiny heads and put them inside boxes, i actually drew the boxes before to fit the heads in. Two in the left are drawn from nothing which is why they look worse, for the other two i used two of my friends' face.