i NEED help (SKIN)

My skin thankfully doesn’t have any obvious problems, but I wanna improve it so it has a smoother texture and a nicer glow. I’m not really sure what I should use or do though. I also have some darkness and fine lines under my eyes, and I’m already using a serum for my eyes, but it’s not enough.

So would you recommend using tretinoin and azelaic acid to get the results I want?(I shave my beard pretty often and i get skin irritation after shaving, so I’m not sure if I can use them or not)

What should I do? I could really use some help.
100% try tretinoin it works best out of everything and everyone I've seen. U can get it without a prescription on highstreetpharma or Indiamart but the India mart sellers are kinda annoying and its pretty hit or miss. There is other online places too but those are just the ones I've personally used.