I have to get ready for school, so let me answer the last one first. We are right now in the new heavens and the new earth. Please look for that phrase as it is found throughout the Bible, especially in Isaiah and then work your way through Paul's and John's use of the same phrase and - in Paul's case - some of the same OT passages.
When did the earth become new? We live on a dying, decaying planet among evil people, murderers, rapists, thieves, adulterers, sodomites. How can you possibly believe this is our reward???? And when did God destroy the old earth with fire?
This is why people say Preterism offers no hope. If this is all there is, then I would rather just die and be worm food.