Starting point is azure.microsoft.com
I just clicked on "Start free" and was asked to login with any already existing microsoft account (live.com, etc). In the registration process you have to provide a phone number for verification (by call or by message) and then your credit card information.
No worries, microsoft offers a start with 170$ credit:
After the registration you can attend to an online course,
settings manager from XFCE (a linux desktop manager) ;-)
I clicked on virtual machines and of course there are listed no machines but a big blue button for adding VMs.