hey,
I feel so lost, everyone keeps talking about exfoliating, but I don't know what to exfoliate with or what strength to use

I would really appreciate help from your guys and if you could also list what type of skin you have i.e scarred, hyperpigmentation, oily, dry, acne prone or not. And the effects that you achieve with the exfoliator i.e smoother texture, less hyperpigmentation and please also let me know if it got worse before it got better so I can be prepared.
P.S if you can suggest where to get the products that would be good to
thank you