Greetings. Dermaroller 0.5 mm is good for a minimalistic facial rejuvenation but you need to train yourself on the procedure. Self dermaroller on hair is easy but on face is complicated. Ideal position is to lie and then do the procedure. It is better to be under a care of qualified dermatologist. However your query is post dermaroller care and that includes a skin repairing cream such as cicalfate by avene.
Next Steps
A good skin care regimen comprises 4 steps - cleansing, toning, moisturizing and sunblock. Based on your skin type, a dermatologist will recommend you appropriate products.
Health Tips
You can consult me online for personal recommendations.