When I do a class or similiar I look at it as a learning project. If I like and enjoy the work and final result I can buy some more fabric and repeat. In classes I find that some teachers confuse me with this is what to do and this is what not to do. Then I go to my machine I can't remember which is right or wrong.
If you have no finished item at the end the class wAs not a learning curve. Eg I went on an expensive class along way from home with a friend who is a far more experienced quilter than I am. Neither of us had ever done the project before. We had to take scraps for landscape with us. My friend kept saying oh I have that at home oh I have thT at home I am not sure about this etc. she was trying me be perfect with shade matches. Me oh that's green, that is yellow , blue and put them on. No bother about matching shades etc. I have a finished project in my classes course folder. Friend went home undid everything and has nothing to show other than a feeling the day was a wSte of money.
So just do it. When I do a very difficult class I take notes and keep with the notes from class and my additional notes.
Have fun and don't stress like my friend.