Their personalities can vary hugely. We've had a very gregarious male and a couple of very chilled males. Females can have a reputation for being maverick and needing a lot of space but their personalities vary too
. Your bin set up sounds nice. You can see how your hamster goes on for a few weeks and if they settle or seem to need more space.
I would suggest you have a large house/nesting box in there that's dark inside - they like that. A shoebox house is ideal. You cut the base out of a shoebox and use the lid as a lift off roof. Cut a hole for a door at the end of one of the long sides. The other end will be darkest. It means they can build a huge nest in a dark hide and bury their hoards under their nest, which keeps them happy. If the house is large enough you can also put a corner litter tray at the end opposite the door (away from the darker area where they usually build their nest) and they will almost certainly use it.
Also if it's a female adding cardboard items tends to keep them happy - like an egg box or toilet roll tubes (slit them down the sides so they expand). Females sometimes like ripping up cardboard!