Active Ingredients.

yes it’s fine 😃😀

Yes you can, those are nothing crazy

Yes you can! unless you mean those active ingredients like aha bha pha then you still can as long your skin is not sensitive to it and for those three you have to use it with caution, not recommend to use every-day, rmb to patch test first for every products. Hyaluronic acid & niacinamide is safe to use everyday even for teenagers ^^

Aside from being a teenager and sensitivity on skin matter, I think what's more important is about necessity; whether those active ingredients are suitable to address your concerns or not, as each ingredient is used to tackle different skin concerns.

Ofcourse but don’t forget to apply spf and to add spf in your routine it’s as important as everything else!⭐️