Recommend me a serum🤗

Hi Pickies!🌱 Long time no talk,, I hope y’all are doing well. Also, I recently became apart of Picky Squad so that is newww. I’m so happy!!☺️ Anyways, I’m in a search for a serum of any kind. Winter is starting soon and I was thinking of adding an active ingridient in my routine (AHA/BHA/other). ❗️My skin is combination type with dry cheeks and oily T zone where I also have some pimples, closed comedones and blackheads.❗️ Also if you have recommendations for a vitamin C serum I would be very grateful. My budget for a certain product is currently 10€ so nothing pricier than that please. I’m listing some products that I considered so please help me and thank you. 🥰 P.S. need products available in Europe