Use the Craftsy classes. They are wonderful (no I don't work for them). I've taken a lot of them and have learned so much. They can be pricey but if you subscribe for a email from them they will notify you when there are sales. The best part is that you can take notes and ask questions via online txt...then the teacher will answer..usually within a day or so. Also the other students will give answers as well and you can read their Q&A's.
I also have learned a lot just scouting around on this quilting board and asking questions. Everyone here is sooo helpful. I've never asked a question yet that I didn't get very good advise.
Good luck with your machine quilting!
Dray