Get used to the confusion redmaple.
Everyone has their own way of doing things and many will claim theirs is the only right way
Most of these 'right ways' work which just shows that our trees are pretty tough and can tolerate a lot.
Conventional wisdom is that trees that have been rootpruned should be placed in a sheltered position until the roots start to grow again - that's probably what you should do until you gain confidence. You now tell us that you have not actually root pruned so I believe there is no reason to pamper the tree, even without any experience.
Inside is a bad idea for most bonsai. Conditions inside puts them under much more stress so outside is best.
Just to clarify my comment which, by the way, was not meant to be advice for you personally in this specific case (sorry to cause confusion): At my place, with experience I can root prune trees out of the accepted times and still put them straight back into full sun. This might not work for everyone but few have tried so we really don't know. I have mentioned it to try to get others to try new things to extend our bonsai knowledge.
to do then.
Just a hint for Red-Maple.
You should also look at joining a club regardless of your experience - the members are always understanding of newbies.
