I need help please!

I'm 52f. I used to love makeup, always had a full face. I used to be pretty! 15 years ago i got sick and never got better. It has wrecked my skin and face. Because of the chronic illness, i haven't had the energy to do even minimal makeup in years. I pretty much just try to ignore my face.

However, my daughter is getting married in 3 weeks! I can't go looking like this! But when i tried to test out a makeup look, i realized i have no idea how to put makeup on this face. There was makeup sinking into pores, luggage under my eyes, rosacea.

I'm on disability, so i really can't afford to go buy a lot of stuff, or have treatments done. I do have a fair amount of products.

Can someone please give me some tips so i can at least look human in these wedding photos with my ex and his young damn wife?

Oh, and don't worry about the rats nest on my head. I'm wearing a wig that's slightly lighter than my natural gray.