You can use a 30 SPF for hands and feet.
You can go for the same shade if you want natural look and one shade lighter if you want to go brighter. You can try shade nude beige or buff beige.
If u dont want to use any product then u have to keep ur private part very much clean by changing ur under garments frequently,cleaning with water frequently n all.but some times we need some extra care for our body parts like we need to apply creams on our face etc..... but in todays life maintaining so much hygine is quite difficult.so these products are good to use.i know another product that is oriflames intimate wash.its really good
A good scrub would either be from biotique and Lotus herbal.
For Oily skin, I'd recommend the Lotus herbal apricot stub.
Do consider investing in a face moisturizer for Oily face too, to ensure that the oil doesn't build up after using the scrub.
u can go for suncros soft matte gel.. it is a physical sunscreen and it is best for oily skin.. i m using it mysle
For your hands, start using moisturiser daily with a sunscreen. Brand won’t matter. Just use one immediately after shower. You will see difference in a month.