Sewing Machine Set in a Sleeve

I was still struggling a bit with my basic bodice's set in sleeves and my stepmother offered her assistance. She's has her doctorate in Family Consumer Sciences Education and a very experienced seamstress. I need the help, but I have have slight issues with asking. It's not that I'm prideful, it's just I don't want to be bothersome. I figured that if I can read, then I should be able to learn but I've hit stumblingblocks comprehending certain techniques. We set a date, but I found this helpful video and cancelled. I'll be starting the construction part of my dress Lord willing tomorrow. EMWR get ready :-)