For me writing a sell letter is the harder part. I like to write, I like the process of finding the good story to sell a product but at the same time it's sometimes very frustrating when you get stuck for days. To help me I've watched some VSL videos from Clayton Makepeace to learn the basics step of copywriting. It was very helpful! Then I also read some chapters of "Adweek Copywriting Handbook" book from Joseph Sugarman.
Here the result of my second copy: https://leah-meirinhos.medium.com/learning-french-with-life-quetsions-b918a3027d75