[Routine Help] I need help with my skincare routine as someone who neglected their skin for years

Hi guys, growing up I was super into skincare (think 14-18) and at 18 I stopped due to really bad depression. I mean I was not washing my face at all or doing any sort of moisturizer .. ever. I recently got back into it this year. I’m almost 22, so let’s say I stopped skincare for almost 4 years. I have a lot to catch up on, and I notice there are so many new products now and I am very overwhelmed. I’ve accumulated a skincare routine but I am looking for product recommendations for serums. I want to incorporate vitamin c into my routine but not sure how to, and don’t know what to use at night. I struggle with clogged pores and blackheads and dehydrated skin. My skin is also sensitive and prone to redness. I’m also open to product recommendations outside of serums. I’ve never really struggled with acne just very very and I mean VERY dehydrated skin. I want to look more youthful and like my age, I think neglecting my skin for years has aged me a bit, and I’m too shy to include a photo, lol. Either way would appreciate the help and suggestions! Routine is hard for me so I like to incorporate 1-2 products at a time otherwise I get overwhelmed. I think using a morning serum and a night serum would really help my routine, maybe a different cleanser at night too, but I am not sure. If a product is good I am willing to splurge on it so price isn’t a problem

My morning routine is

- Beauty of Joseon Green Plum refreshing cleanser
- Laneige Cerapeptide Cream Skin Mist Toner
- Beauty of Joseon Glow Serum
- Prescription Azelaic Acid 15% gel
- Aestura Atobarrier 365 Cream

My night time routine is the same thing but instead of my Prescription Azelaic Acid cream, I replace it with my Prescription Tretinoin 0.025% cream

I don’t really understand how serums work but I struggle with dullness and dehydrated skin which leads to fine lines. I have oiliness overproduction around my nose.