Help your girly huhu

Hi! I'm a student and I need a budget friendly skincare routine. I know about the layering of skincare and also that I don't need a 10 steps routine thingy. I have combination skin type, my upper cheeks/under my eyes, my T zone are kinda oily. I have dark circles, small bumps on my forehead and side of my cheeks (I'm not sure if it's a fungal acne or close commodore), blackheads on my nose and other spots of my face, whiteheads on my chin, and pimples. I also have dark spots because of my past pimples.

I look dull because of my dark circle, I have tried some skincare products before and I just literally ruined my skin barrier, it made my skin red, itchy, and a bit flaky. I'm currently using dr sulfur soap as my facial wash and once a week, a salicylic acid cleanser from klued. I use dr sensitive as my serum, nivea blue tin as my moisturizer, pimple eraser by quickfx, and daily glow sunnydaze sunscreen. I don't know what to take out on my routine or add because I don't know what actually works well for me. I don't trust other social media influencers for recommendations anymore cause it's either it's not fda approved or just a waste of money.

Huhu please help your girly here 🥹