New baby beardie!

Hello!

My sister (17) and I (22) just got two 3 week old bearded dragons from a reptile expo. We want to ensure that they get the best set up possible. Can anyone recommend enclosure sizes, substrates, hides, domes & bulbs, etc? Any info is greatly appreciated! I’m doing my own research as well. They are both male. I’m not sure if they can be housed together for now or if they need to be immediately separated. We are super excited for these little guys!