Maybe you need to engage in the withdrawal process to get access to the options available to you...and to do that you'd need funds in the account.
Listen, if they don't have information on how to do transactions (without having to actually engage in a transaction) then their business is shit. There are plenty of other options out there. Must you us Kraken?
It says you haven't reach the minimum amount to withdraw, is that an error on your part or theirs?
I don`t have any USD or USDT there to withdrawal now. That`s why it says that but that`s not the point. It doesn`t show or give you the option to wire transfer your fiat USD. There is no page for it.