How to manage acne scars

I had scars from acne treatment in the past and they were unsightly.

I'm trying to manage it. In the past, acne treatments and ointments were not very good, so even small scars were unsightly.

I have some scars left and I want to get them completely healed.

There are various methods for removing acne scars, including skin grafting, micro-fat grafting, scar revision, and tissue expansion.

I know this, but I want to know which treatment method has the least side effects and can be used in the shortest period of time.