How to bond a hamster to two owners & Other questions

I have some more questions leading up to the arrival of my first hamster :)

1. I live with my partner and of course we are both wanting to bond with the hamster. I have seen a lot of bonding videos but they are always focused on just one person. Is it possible to do the same bonding methods but with two people? Eg. the paper scent method but we scatter both of our scents & taking turns to do food bonding.

2. Hamster age - What kind of age should I expect a hamster to be when I get it? I will be getting one from the pet store (I know it's not ideal and the breeding is not ethical, but I also really want to save one from those conditions and it is my most accessible option) and intend to ask about the age.

3. How many hides is too many hides? I've come to realise that I've bought a LOT of hides... 5 surface level hides and 1 that goes under the bedding for burrowing. I know there is a recommended minimum amount but is it possible for there to be too many? Of course I will be providing other forms of enrichment and not only hides, my hammy will have everything I can possibly find recommended. 3 of the hides are ceramic and I'm also wondering if that's too much ceramic especially with winter coming up.

Thank you for looking and answering my questions! Please don't feel you need to answer all of them, just answer the one(s) you have knowledge about and I'll be really happy to learn.