Detailed Review Of Preparation

Microsoft Learn self-study: when you go to the certification and scroll down, one way to prepare is "online - free".  Just follow along with those modules, read it all, review at the end, and you will be set.  https://docs.microsoft.com/en-us/learn/certifications/azure-administrator?wt.mc_id=learningredirect_certs-web-wwl

Udemy also has several practice exams for about $10.  I got this one by "Exam Pass" and it was very similar to the test: https://www.udemy.com/course/draft/2411890/