Don’t over think it, it’s just classes and flexing your math noodle consistently. Pro tip for masters work, make a schedule and treat it as a job. Undergrad you can easily get away with “eh I can cram before the test”. Not in masters and above. With the schedule though it’s extremely important you schedule days off, burning out is hell and extremely hard to overcome. I suggest weekends so it really is a job like schedule. Utilize your schools school psychologist/psychiatrist, it’s free (usually) and helpful (usually). Good luck and remember to have life as a priority too!