I'm so happy for you, Claire! You'll never regret this investment into your knitterly education.
Honestly, I learned things I didn't even know I didn't know! And many things were demystified for me, such as simple weaving, needle felting, knitting machines, spinning yarn! Many simple techniques were made clear, and what they're best used for! I even enjoy the crochet segments and learned things I can use for my knitting!
My suggestion....start with Season 100, Disc 1, then 2, then 3, then 4. Then move on to Season 200. Etc.
I bought Season 1000 recently, and I'm saving it for our mountain vacation next week. I bring my Sony DVD Player and earphones....and I'm golden! This will be a real treat for me while my husband is out in the woods all day.