Yeah Azaleas need to be outdoors and in a spot thats protected from afternoon sun although some are more tolerant to sun than others but to be safe morning sun is best. They can be quite slow in growing and the flowers bud only on new growth, so i find its best to not repot too often as the shoots will grow quick and youll keep wanting to trim them back for shape and looks and never flower as much. I've got a few Azaleas one a Satsuki, I've had the problem of not being able to get it to flower since I was trimming too often, its been in the same small pot for over a year now and it seems to have slowed down so I'm hoping it will flower late Spring. They like a fair bit of fert and a really good draining mix (not just pebbles thou, a typical mix of potting mix and pebbles should be fine). I know that in the ground they like lots of water but good drainage, I've killed a couple of little ones by over watering. Let the pot dry out before watering again.