Before you are able to borrow, you will firstly have to deposit your tokens and use that asset as your collateral to borrow.
Make sure you click and switch on so that you will be able to use it as a collateral to borrow.
Once you are done, head over to the borrow page and select the asset that you would want to borrow. Before you borrow, understand the risks behind borrowing, take note of your risk factor as well as your liquidation LTV before borrowing.
Once you have fully understood it, proceed to selection of how much you will want to borrow and confirm,
You will then need to approve and confirm the transaction on your wallet and you are good to go!