Hi Isabelle✨
1. Yes, you can use it both morning and/or evening after cleansing, but I recommend starting to use it in the evening 1-2 times a week. It contains acids that can make the skin more sensitive to the sun. Don't forget sunscreen during the day.
2. Yes, it contains acids (including salicylic acid) that exfoliate and can help reduce pimples, blackheads, and congestion with regular use.
3. Absolutely! Apply moisturizer afterwards – and makeup works fine on top as usual if you later decide to use it during the day.
Hope my answers can be helpful and that you have a lovely day🥰