Dermaroller usage at home. Kind advice.

I had a very severe acne during my teens and post that i have very deep scars on my face. I have done skin peeling, derma rolling, lazer and other techniques from a professional dermatologist but my scars are still deep and I and very visible. I am really depressed seeing such scars and this impacts my mental health and when others start advising me about scars it really takes a toll on my self confidence. I have done all that is required and spent a lot of money on the treatments. Of late I came across that derma roller can be used at home. I feel I can give it a try at home but very doubtful on what creams to use before and after. I would like your advice on what creams to use before and after derma rolling to give a good result to reduce my scars. Kindly help me. I am really depressed and i want to boost my confidence. Please help me with your kind advice.