Best books/youtubes/resources to learn all about embroidery machines

I just found out my local library has an Idea Lab and has a embroidery machine! I went to check it out and realized I have no idea how it works but am very eager to learn~

What are the best resources you have found for embroidery machines and sewing? I prefer books so I can refer back to certain pages and reread techniques, but all resources are welcome.

Thank you!