I'm so sorry that happened to you. There is NO excuse for that woman. Maybe she was having a bad day, but that doesn't excuse her behavior. We have all run into people like that, but please don't let her defeat you. You sound like a very nice person, and show a lot of potential. Don't forget, everyone here will help you if you have a problem. Paper piecing and foundation piecing are very similar and I am thinking that Carol Doak's website has a lot of pointers for you. Keep on quilting, and don't let that woman get you down. If she ever screams at you again, simply walk away. Don't let her get away with it.
Sue