I would like to know how to remove acne scars.

When you go through puberty as a child, you may experience acne breakouts to varying degrees.
Nowadays, there are ways to treat it in advance or other options, but that wasn't the case 20 years ago.
Place a hand mirror on the desk and use your fingernails as a tool to press your two fingernails together to remove the grains.
I solved it by pressing down on the Monami ballpoint pen's lead hole and squeezing it out.

Acne scars as a result..
Actually, this shouldn't have been done this way.
I didn't have any other equipment, so I just kept doing it like this and ended up with several acne scars.

The resulting acne scars still remain.
Is there any way to remove these acne scars??