Hi Maggie,
#1 I would recommend speaking to the owner of the subscription (most likely your school's IT department) for access rights to creating a resource group. Microsoft/people in this community do not have the ability to change these permissions.
#2 If you would like to continue with the learning path on your own, I suggest you create an Azure Free account (which gives you $200.00 worth of credits for the first 30 days).
https://azure.microsoft.com/en-ca/free
For more information about Azure Free, please see:
https://azure.microsoft.com/en-ca/free/free-account-faq/
If this is helpful please accept answer.