Your best bet is to choose one of the trunks - pref. the one (if there's any choice at all) with some movement in it, and let it be the one you develop.

Azaleas are basally dominant, so do not pinch or prune much along the crown/apex. - only as needed to maintain shape. The majority of growth will occur low and spread out. Pinch new growth off the selected trunk as it appears.

To keep it healthy, feed with an acidic fertilizer every 2 weeks during growing season. (Miracid or Ochid fertilizer)
I am not familiar with "cherish", but if it came from a florist or greenhouse you will need to verify its cold-hearty-ness. Most greenhouse hybrids are not cold hardy.

These hybrids can be overwintered indoors, but their needs are different than your "normal" houseplant. Do some research to be ready for next fall.

Is it in flower now, or recently finished?

Matt