@Tracy-Ratz , I hope all is well. An E5 license, along with an Azure AD P2 level/license does cover most of what you need, but as you see during the course, there are additional add-ons that are necessary as well, such as the Microsoft Cloud App Security/CASB solution, Endpoint Management with Intune as well as M365.
The best thing to do is to work at your pace and cover as much ground as possible as you study, but create a plan that allows you to work on the theory and the background knowledge acquisition BEFORE you kick off / start your demo licensing, so that you maximize the time you are able to spend doing things to reinforce your skills.
If you have any questions along the way, please be in touch as needed. My direct e-mail is: email@example.com
Good Luck !!!