I'm a beginner just starting out with skincare. Experts, please help me!

As I get older, I thought I should start taking care of my skin, so I did some research and bought a few things, but I'm not sure if I'm doing it right...

I have enlarged pores and have dehydrated oily skin!

After cleansing in the evening: VT Cosmetics Lidle Shot 100 - Vitachiol Serum - Vitachiol Ampoule - Laro Su-Poser Regenerating Cream B5+

After cleansing in the morning, The Ordinary Niacinamide 10% + Zinc 1% Essence - Dr. Hedison Moisturizing Cream

I apply it like this before going out; are there any better products or ones I should add?

Would it be okay to switch to a different product routine once or twice a week after cleansing? Please also recommend some sheet masks or topical packs!