Kellie H
I've always been told that a properly fitting shoe shouldn't need a 'get used to it' / 'break it in' phase. But, honestly, I've never had a pair that feels great from day one either lol I'd say you got a good pair!!
I just got some orthotics for the first time.
I was told to wear them for about an hour on the first day (or until they bugged me). Then two hours the next day (or until they bugged me). And so on, until I can wear them all day without discomfort.
Honestly, they feel fine. I've been wearing them pretty much all day since I got them. Hopefully this means that I'm just adapting quickly to them and not that I've been given duds (placeborthotics, if you will).