Hey Jes, there are various Youtube videos out there (specify Intarsia with wood as there is also Intarsia with knitting.)
Besides JGR's in person classes she offers here close to Knoxville area (she is just outside in Seymour a small area just outside Knoxville proper on the way to the Smokys,)and the classrooms in a tube which she offers, she also offers some Books and DVDs. They can be found on her site here: https://intarsia.com/collections/books-dvds - You can get the two DVDs as one set and save a little money. https://intarsia.com/products/intarsia-scroll-sawing-contouring-dvd-set?_pos=3&_sid=c5ff401f1&_ss=r They are Scroll Sawing for Accuracy and Contouring for Intarsia. I bought both and used them before I ever took one of her classes. I also have many of her books. This is the newest update to one for Beginners is Intarsia Workbook and is found here on her site:https://intarsia.com/products/intarsia-workbook-2nd-edition?_pos=1&_sid=136bba309&_ss=r All are great and offer lots of patterns to work with. Be sure to explore her site throughly because she has lots of help, information, tips, and some free patterns and more throughout the site.
Bruce Worthington has an E-book where you craft a Teddy Bear. You can find his site here: http://www.intarsia.net and the link to the Ebook here: http://www.intarsia.net/e-book/Intarsia101.htm - If you scroll down on the main page of his website and look over to the left, there is also a 2nd Intarsia E-book listed and it is for shaping a rose. If you click on it, it should download the file to your computer. It will not open to a new page on his site. Also note that his site and Judy's are similarly named, the only difference is that Judy's is .com and Bruce's is .net.
Kathy Wise is also one of the other prominent Intarsia Artists who creates and sells patterns, has books, and does classes. She also does a pattern of the month club. I have not taken any classes directly from her. I have however purchased and used some of her books to learn. Her main site is here: http://kathywise.com and you can find her books here: https://store7626357.ecwid.com/#!/Books/c/15463196/offset=0&sort=nameAsc and this book is her main beginner book, Intarsia Woodworking for Beginners: https://store7626357.ecwid.com/#!/Intarsia-Woodworking-for-Beginners/p/57175356/category=15463196 . She also provides some free patterns on her site. The pattern of the month club information can be found here: https://store7626357.ecwid.com/#!/Wise-Intarsia-Pattern-Club/c/27397997 as I understand it, she offers a closed group on Facebook for the Pattern of the Month Club where she and people working on the pattern can converse, get help, tips, information, etc. I have not tried the Club yet. One important thing to note about the pattern of the month club is that while the patterns in the club are exclusive to the club when first released - They can and have been released to the general public for purchase a few months later as she clearly notes on her information about the club.