The best advice I can give, being a long time keeper of exotic pets, is to do your research before hand.
Sugar gliders require a lot of care and wouldn't be recommended for a beginner. They are noctural and need to be kept covered during the day so they can sleep or put in a very low light room.
We occasionally got these at the pet store I worked at and they were pretty expensive, if I remember right.
Please learn all you can before you buy any exotic pet.