Braces advice

Hey all!
My baby is getting braces in a few weeks, one thing I forgot to ask the orthodontist, but I will, Is what do we do about a mouth guard for sports? Is it recommended to wear one or will the wax do the trick? Wondering about hurting the inside of the mouth as well as damage to braces. Not heavy contact sport and a mouthguard isnt a requirement. I've seen other kids wear nothing but I'd like to be proactive if possible.
And actually, any advice on braces would be greatly appreciated! Neither of us have had them to be much help haha!
Thanks all