Feed them a balanced high protein diet, blood worms, brine shrimp, beef heart.In about a year you will have breeders,be sure to do frequent water changes and remove any un eaten food 30 min after feeding,when you feed your Angels high protein foods they will foul the water fast if not removed.
Good Luck
If you need help just PM me and I will tell you how we do it, we currently have 14 tanks of fry-juvies and 10 Breeder Pairs
Pops/Pa.