I have been studying for the 70-743 exam (upgrading from MCSA: Windows Server 2012) for the past 6 weeks, and was able to pass it with a decent score 817 (min. passing score is 700).
In order for me to pass, I used differrent study materials such as books, videos and websites.
If you are on the same journey, I’m providing a study guide of which resources I used, and which questions you will need to answer right of the bat for you to pass.