To create a wallet model-based account, add a username (aka an account name) to the ‘Account Name’ field. Add a strong password to the ‘Enter Password’ field and enter it once again into the ‘Confirm Password’ field to verify the password, press 'Continue' button. 

After that confirmation message appears on the screen. Make sure that you remember your password at all times or keep it in a safe place. Being a decentralized exchange, we don’t have access to users’ passwords. If you forget or lose the password, we won’t be able to recover it for you and you’ll lose access to the account.

Make sure you store your bin. file and password securely.
Note: in case you lose them, you won't be able to restore access to the account for you.

All steps you can view on this small guide.