Wow! You are doing a great job! I used to teach Family and Consumer Science and several times I helped girls making their prom dresses. They were a challenge, but so much fun and a joy to see the pride on those girls' faces. Most of them never wanted to make that muslin bodice to check the fit, but they were glad later when their tops fit right. That satin or taffeta fabric would not rip out easily.
I don't know what a "Q" foot is either.