Thought on sharing my personal experience with passing Salesforce Marketing Email Specialist Exam from the 1st time.
The place to start with would be these notes - https://docs.google.com/document/d/1f0bcZLJW9vPh5u8U7KnlOK2iCnvj5ClqquXxxvzdzpY/edit
I clicked on each link that took me to marketing cloud article and passionately ready through all the theory. After that I went through all these quizzes summarised in the list below, and wrote down all the questions myself on small square papers with question on one side and the right answers on another.
Also this pdf holds many answers to exam question and overall is interesting material to read - https://drive.google.com/file/d/1VLqv6mUmWOkvaRy-vQ3ebBA-qtETV1LN/view?usp=sharing
I hope this information will help you to pass the exam. :)
If you have any questions, feel free to drop me a mail.