When you get paid it automatically goes into your Paypal account.
You look for how you get paid on this site,forgot where that is,but you just put your Paypal account number.
Maybe go with the easiest ones first,or perhaps ones that don't require you to buy anything.
If they were optional,you could un-finalize your shop and add them.What do you mean by how do you add them?Are you looking for technical advice?And if so what kind of device did yiu use?
I would do bestmark but they don't put the name of the store or address unless you are assigned the shop.
Maybe check all the available ones and try thhe easiest sounding ones first,or maybe ones where you don't have to buy anything.
That is true they get snapped up in a matter of minutes.But even if you have a llot of stuff to do and are never sure if you can shop on a certain day,check anyway.