I'm looking to get acne scar treatment in Gasan.

I'm looking into acne scar treatments ㅠㅠ I have one indented scar on my glabella area and I want to focus the treatment just on this spot, so I was planning on getting it done with a 'saesal' needle treatment.

But the scar is deeper than I thought, so I'm wondering if the 'saesal' needle treatment will be okay... I'm planning to get it done at Rodam, and usually, how many sessions do people get?