Contouring for an aging face?

Hello. Before giving birth, I think I used to just wear cushion foundation and lipstick, but after childbirth, it has become difficult even to apply sunscreen. However, now that my children have started kindergarten and I need to attend events like entrance ceremonies, I want to do basic makeup, but it is frustrating to look at my face, which already looks aged. Would contouring be somewhat effective? For a complete beginner, which would be easier: stick or eyeshadow types? I want to contour because my lower face is sagging due to gravity.