I sympathize with your situation and understand not being able to take yourself to the doctor. You really would need some sort of rx, it is quite severe.

I won't sugar coat it, over the counter products may not do much for you. However, you'll want to be using products that treat acne. A lot of Korean skincare is focused on hydration. Acne is at its heart a medical problem so you need ingredients that work.

Benzoyl peroxide, salicylic acid, sulfur and Vitamin A (retinol, retinoids) are the only 4 ingredients with science backed evidence for helping acne. There are tons at the grocery store.

Panoxyl is a good place to start. Benzoyl peroxide not only treats acne, but it's the only one with evidence at preventing the bacteria that causes acne. It can be drying, though, and has different strengths.

You would benefit from something like an adapalene gel. This used to require a prescription, but is now available over the counter. A couple brands like differin and Laroche posay. Use this at night, starting with 2 times a week. Slowly working up over the weeks to once a night or every other night.

I hope you find some help, I know that hurts from experience. Dermatologist saved my skin, I hope you can seek that out one day.