One of mine was 2-3 when I adopted him and according to his previous owner he had never had a cagemate and had very little interaction. When he realized there were gliders nearby he was intensely curious and immediately started calling to them (and Gimli did the same back to him from the other cage). When I wore them in separate pouches it was the first time I heard the clicking/purring sound in gliders. He purred so loud! It was wonderful to put them together, and worked out instantly when I introduced them.
He does occasionally choose to sleep by himself still, but it's not often. Today my quad decided to sleep two in each pouch. In any case, I hope your introductions go just as well!