[Routine Help] My skincare routine is pretty simple and has worked thus far but I wanna begin anti-aging treatment

I'm 21 & in the morning I cleanse my face with the CeraVe Hydrating Cleanser, apply La Roche Posay Lipikar Baume AP+M "Anti-scratching, anti dry skin flare-ups & immediate soothing" solution as my moisturizer, use Barulab Green Tea Hydro Calming Sun Cream for sun protection and I remove my make-up & sunscreen if I've worn any that day with micellar water & repeat the morning routine when I come home

I'm pretty pleased with my skin other than the mild box scars I have on my left cheek for which I'll be seeing a dermatologist soon but I wanna incorporate some anti-aging products into my routine, just not sure what to start with. My skin is pretty sensitive & my T zone gets oily. I tried applying 0,05% tretinoin, I attempted the buffer method & even reduced my usage frequency to once a week but it made my skin sting all the same.