Is Retin-A safe to use at the age of 21? Are there alternatives to treat visible open pores permanently?

I'm 21 old and I'm getting constantly clogged pores and acne since 3 years on my face resulting in the formation of a large open pore and rough textured skin, blackheads, whiteheads and bumpy skin is constantly prevailing. I fear increasing large open pores. will Retin-A help with this? is it all right to use Retin-A 0.025% at this age?