Hi Arlene,
It's hard to imagine heaven and the the Milenial Kingdom.When i do,i either cry that i'm not there yet even if i know that i don't deserve it,or have weird life questions like ...why did you Lord make hell in the first place?...you knew that most of human beings will end up there...or i'm asking God to please make hell last only about 2000 years because the ideea of people being there for ever is terrifying to me even if is justly justified.
Anyway,to try to give you my take on it,i think that  alive jews plus alive christians will enter the millenial kingdom(those who will not be killed  by Antichrist) and we will be there too but we will reign with Him.I don't know about the rewards.I just want to make it there.If He want to give me a house on a tropical beach with palm trees around i won't say no(that's my dream by the way).Unfortunately i don't think there are such things like this in heaven...i've heard that people saw mountins,grass etc.I'll settle with watever.I'll sleep on the grass.:)
Blessings
MARI