Flute lesson

I had a flute lesson on Sunday 13th of November. Due to everything's that's been going on I haven't had much time to work on the burton so we spent the lesson working on my study and sight reading flute duets. Which gave me the idea to compose one. Sue also said she will look me out a technique book for vibrato. I've been trying it but it's very difficult. My diaphragm isn't strong enough yet.