How to remove a large surgical scar in scalp?

I have a large surgical scar that runs over top of head from 6 weeks back. I want to know how to best reduce it.
Products I have:
LLLT helmet- been using since 4 days out
Derma rollers- 1mm, 1.5 mm , 2 mm
Copper peptide lotion/ Lugol's/ DMSO (stings)/ Magnesium oil, variety of oils-- lavender/tea tree, jojoba, grapeseed,cedar,thyme,

I've rolled once after 5 weeks.. been trying Lugol's/DMSO but pretty irritating. I'm hoping to regrow hair though I know that's gonna be tough... any help is appreciated.

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