You have actually very good looking skin with really minor imperfections.
Once in 3-4 weeks, use a dermastamp on your round-shaped scars and needle the long scar with the single needle. Then roll all over your cheeks with the 1.5 mm roller. For the pigmentation, use the 0.5 mm roller twice a week.
A one-liner dermaroller is not suitable for your type of scars, except for the stretch mark. The A-Ret cannot be truly replaced by Infadolan as they contain different type of vit. A. Nonetheless, needling is effective for stretch marks even without the A-Ret. If you bought Infadolan, apply it after needling your stretch mark.
Concerning your nose, I paste here my answer to another customer with the same problem:
Whenever I receive a question about scars on the nose, I get nervous.. The problem is, that the skin on the nose reacts very unpredictably comparing to the rest of the skin. Nasal skin can heal worse than you started with. There is no fat layer under that skin, there is only cartilage and that might be the reason.
I can only suggest this: Use the single needle on it but do not do any aggressive needling. Concerning the nose, ignore the guidelines for needling that are on our website. Make just three pricks into your scar (to the bottom of the scar not to the edges).
If it heals well, make four pricks the next time. If it heals well, make five pricks the next time. Continue like this but never do aggressive, dense needling. Just a few, very gentle pricks.
Do not needle deeply on the nose.
You can replace the single needle with a dermastamp but the same rule applies. Start slowly and never dermastamp aggressively.
A customer of ours reported good experience with needling her nose (answer #5): https://http://forums.owndoc.com/dermarolling-microneedling/Needling-and-dermastamp