Tutor advice

Today I've gotten some bold advice from one of my tutors. She suggested that I should draw more from primary sources than from my imagination so she told me to visit places such as museums and zoos. She also suggested that I should include information on the origin behind the mythological creatures that I have and will be working on so that whoever looks at my sketchbook can also learn about the myths and stories. Another thing she said was that I should probably narrow down my project to just one or a few myths because at the moment,  it's too vast but I'm not sure about it because I deliberately tried to make it vast so that I could have something to work on without getting stuck. I will take her advice into consideration, I think it'd be good to draw from primary sources as it will help me understand the better anatomy of certain animal features. It will also be good to include information on myths because it will help me learn about them as well as for people who looks at my sketchbook.