I can imagine you’re excited! The main thing on bringing them home is to make sure everything is set up on the cage in advance so ideally you don’t need to tweak anything for at least the first two weeks while they acclimatise.
It can take a lot of patience at first, because they need to be left alone in the cage for two or three days to settle in, scent mark and decide where to sleep and so they don’t get too stressed. Whereas most people are itching to handle them straight away!
If he’s from a breeder he may be fairly hand tame already but they can be fairly skitty with the change of environment and new people. The other main thing is to have plenty of substrate in the cage (ie fill the base to the top at least) and don’t clean anything out for the first two weeks

. They like to burrow down and dig the odd tunnel. Spot cleaning is just removing the odd handful of substrate and replacing it with a new handful and mixing it in a bit so it still smells familiar. It’s only their pee that is unhygienic. Poops can be picked out as and when necessary - they are just like tiny seeds and quite dry. And they sometimes eat them (which is normal). So unless they start taking over in a big way, don’t worry about those at first.
The key to a happy settled hamster is to not clean everything at the same time

. So the wheel as and when needed. Change the sand on the sand bath when needed (pee clumps can be scooped out for a while). And mainly spot cleaning of substrate. When you do come to need to change the substrate - even then it’s good to keep at least a third of the old substrate that’s clean and spread that on top of the new substrate - so everything still smells familiar. That layer will get spot cleaned out eventually

. Also a big pile of torn up strips of plain white toilet paper in the cage mean he can start on building himself a cosy nest to feel secure. They often bury hoards under their nest and snack in bed
The reason for all this is that hamsters scent mark their territory by rubbing against things - so they can claim it as home and feel secure.
It is exciting and it’ll be lovely to meet little Pete when he arrives. He will probably explore his cage and check everything out
