Sugar gliders are adorable.... but they take work and dedication. Especially as they are nocturnal.
They need a nest pouch of some sort to sleep in and a regulated diet to make sure that they are getting the right calcium to phosphorous ratio. You cannot just free feed them otherwise they will eat all the proteins (especially bugs) and ignore the rest of their food. In the wild they live on tree sap and bugs. Tree sap is always available, bugs are not. So they go after bugs before anything else.
They do have an odor. Males more so than females. I am not sure if you mentioned the sex of your gliders, but two males will usually fight. And if you have one of each you will end up with babies if you do not neuter the male. So, if you have anything other than two females you will want to look into having the boy/s fixed.
For bonding with them if you have a pouch, put them in the pouch and carry it around during the day so that they get used to your scent. Also put a scrap of cloth that has your scent on it in their pouch so that they have it close all the time.
My male was a wreck when I got him. He was a rescue and malnourished. It took a long time to get his diet right and get him healthy again. And even longer to get him to be at all social. We got a little girl as a friend for him since they should not be kept alone. She was the cutest, sweetest little girl. She NEVER made that sugar glider crabby noise and would just curl up in your hand.
The biggest trouble I had with them is the pee almost constantly. And little hamster poops all the time. I ended up with a touch allergy, so when they would climb/pee on me I would end up with red marks where they climbed on me
so ours we rehomed ours.
Good luck and I hope you enjoy them. Like all exotics, they take a little special care, but they are certainly cute.