I want to use Thunderbird mail, but can I use my outlook e-mail?
It's not that urgent, but I want to use it.
Outlook is a software which runs on Windows only, not Linux. So if you want to use Outlook on Ubuntu, you will have to use a Windows emulator like WINE to make Outlook run on your Linux.
can I use my outlook e-mail?
Do you mean you want to use the outlook client? or do you mean you want the email you have on outlook, configured on Thunderbird?