Should I use serums at 16?

I’m building up my skin care routine gradually as I have found that my skin needs it. I’m 16 and have never tried serums before but if I would benefit from them I would like to give one a try. My skin type is normal but can get slightly oily at times and I’ve never had acne but just the occasional pimples and brown spots from pimples. My skin by cheeks is little red as it’s sensitive and always been like that. My current routine is cleanser, toner, *then i went to put serum here*, moisturiser and sunscreen. However what serum would suit my skin? I’ve seen vitamin C serum but not sure if that would be compatible with my skin. Also do note that my skin is pretty much a virgin to the heavy skin care stuff rn. Still baby ahah. Thank you!