"I would not advise using face masks willy-nilly! If you have dry skin and you're using 'purifying masks' such as charcoal masks, you might actually just be drying out your skin and doing more harm than good."
If you're unsure of your skin type, you're better off seeing a professional and having your skin diagnosed for any medical conditions, such as acne or eczema, and being advised on what products will work best for your skin. It'll be much more effective in the long run than buying products off the shelf.