No you can have the name of the application different from account name or the same as well with different language
No credit card required at the registration phase, after the trial period you can pay through Kiosk services such as Aman
Corporate and individual accounts are available on Oppa platform with your choice, service limitation vary between accounts
Yes, once all documents have been submitted, account can be changed to corporate account
Just Go to Oppa.app and enter your business name, personal details then you have an account.