Step 1: Go to the Big Time Marketplace
Step 2: Select the NFT you want to purchase
Step 3: Click "Select and Buy"
Step 4: Select the NFT issue number you want to purchase
Step 5: Select your payment method, click "Pay with Balance"
Step 6: Once the transaction has been processed, the NFT purchased will be added to your account. You can go to "My Collection" under your profile tab, once here click "move to in-game". once completed you can equip the NFT in your in-game inventory (press "I") under Cosmetics.