I'm supposed to be writing my master thesis now in numerical optimization and I have a chance to attend an online course in Analysis. It is unrelated to my thesis topic and the course will require me to work hard and I can't withdraw from the course. I want to take this course because I'm planning to shift afterwards to mathematical analysis and I might need a recommendation letter from the lecturer.
I'm hesitant because I'm afraid to get behind in my writing? Do you think it is advisable to take the course?