If you are a complete beginner with the Azure cloud platform, then first have a look at the basic concepts of Azure cloud like the services that it provides, getting started with it, etc.
I suggest going through a couple of blogs online. https://www.edureka.co/blog/microsoft-azure-tutorial
You may check a series of blogs on Azure that would ensure you are aware of the fundamentals.
In case reading blogs isn't your cup of tea, you could check out a youtube playlist that fulfills the same objective.
check out https://www.youtube.com/watch?v=0bPJPiX89K0&list=PL9ooVrP1hQOHdFketT6JzY-71nBgIu-n0&index=1
You could then try to get hands-on by trying a few demos and get a real-time experience.
You could also check this out for Azure training: https://www.edureka.co/microsoft-azure-70-533-certification-training
Try taking mock/practice tests as many as possible. This should suffice!
All the best!