Сan you tell me how to withdraw funds? What kind of recipient address is asking for? And is it possible to withdraw Bitcoin?

To withdraw bitcoins, you need to go to your balance in the upper right corner of the screen and click on the withdraw button next to the required currency (in your case, Bitcoin (BTC)).
After that, you need to enter the wallet address (BTC) to which you want to withdraw and the amount to withdraw.

You can request a withdrawal at any time, but withdrawals are made only once a day after 11:00 UTC.