[nonamechicken]

I am not sure how helpful this would be to you. I just started this course: https://www.coursera.org/learn/learning-how-to-learn

This seems to be very popular and highly recommended in Reddit. She briefly talks about how she was scared off of maths at one point in her life and later went on to get a phd. She also has a book on the same topic. Note that the course is not math specific.