That is great your daughter wants to sew with you!
My Mother wouldn't let me "bother" any of her sewing things and she made beautiful quilts & clothes. So I always thought I couldn't do that. BUT, I made my first baby quilt at age 43 for a GD who is 19 now! She still has it. My sister also quilts and she did boost my confidence a lot, she still does lol.
So build confidence & just keep encourage the kids no matter how old they are and what they want to do! Make them believe thay CAN!