All parrots are trainable up to almost any age if they are healthy. The first thing you have to do is put both of them into separate cages. What you've done here is set yourself up for disappointment because they will be more attached to each than to you which causes problems with training and taming especially.
BEFORE any training or taming of any kind, both have to be thoroughly examined by an Avian Vet in your area for possible infections or other physical problems. Do not start any training until an Avian Vet has either cleared them physically or after they have taken meds prescribed only by Avian Vet to get well. Sick birds and those becoming sick cannot learn because they do not feel well and have enough energy for it, so take them to avian vet first.