Two sunscreens that were recommended (I asked a similar question) were Academie moisturizing lightening fluid SPF12 and Devita 30. I don't like products that are greasy or feel heavy on my skin therefore I went for many, many years without using any sunscreen which resulted in areas of my face being sun-damaged.
Find a sunscreen that you like, put it on at least 10 minutes before you put your moisturizer on; if your skin feels "sticky or greasy" try using skin blotters to absorb the excess oil. I don't know of any sunscreen you can put over your make-up. However I would try for a sunscreen of at least SPF30. Layering sunscreen with a moisturizer containing sunscreen is not culmative -- sunscreen 30 + moisturizer 15 -- does not give you SPF 45. I have seen sunscreens with SPF as high as 80.
Find a sunscreen that you like, put it on at least 10 minutes before you put your moisturizer on; if your skin feels "sticky or greasy" try using skin blotters to absorb the excess oil. I don't know of any sunscreen you can put over your make-up. However I would try for a sunscreen of at least SPF30. Layering sunscreen with a moisturizer containing sunscreen is not culmative -- sunscreen 30 + moisturizer 15 -- does not give you SPF 45. I have seen sunscreens with SPF as high as 80.