take from the spot position on the wallet everything convert to BNB and then from BNB to fiat whether it is in EURO or USDC or PLN and then transfer to the bank account

Hello, I would like to close my account but I don't know how to withdraw (or get rid of) the assets I have.
As far as BTC is concerned, I know how to withdraw it, but I don't know and can't do anything with the rest. Please help.