From my own personal experience, when my daughter (who was yung) wanted to sew. Get her a good standard machine, teach her the safety RULES in which can use a sewing machine and she will impress you. Mostly, she want get discouraged. If she doesn't have trouble with the machine and you don't have to get several ( like me) . It will beeasier on both of you.

Now my girl loVes Hand Piecing. She took sewing classes and knows how to use the sewing machine.
She is a bit kin to her Moma, I love Hand Piecing Too.
Do whats best for her abilities.

Move her up if, you think she's READY. I just never feel that holding them back is beneficial, if she's ready to go forward. Learning early is awesome. So glad your starring this GIFT with her.
HAve Fun, both of you.