Click on an NFT pool to learn more about the pool. After clicking on an NFT pool, you'll be redirected to the NFT Pool Info page.
Click on the 'Deposit' button to open the modal. You should see something like this:
First enter the number of pool tokens you'd like to buy. Next, click the 'Approve' button to allow the pool contract to spend your mcUSD. Once the mcUSD amount is approved, click the 'Deposit' button to purchase tokens.
Once the transaction is confirmed, the 'Your Investment' section of the NFT Pool Info page will be updated to show the USD value you deposited as well as the pool tokens you received.