What treatments can I do for old self harm scars? (Photos)

They're about 4 years old. Raised. I recently started using silicone sheets again after getting decent results with them in the past. They're great for concealing, especially since I live in a hotter climate now but I'd like to know my other options. Would dermabrasion work? Lasers? Or will the silicone sheets flatten them enough to where I can get a tattoo comfortably. I'm an african american 21 year old female. Thanks!