Someone asked me to add this to the program itself, and I’ll do that sometime. For now, here’s a playlist of Linkage tutorial on YouTube that I created:

https://www.youtube.com/playlist?list=PLGxa5y5etMwAY238yKu1orXTnzD9h5nL_

There are two or three simple tutorials that someone else made. You can find them doing a search. Since I cannot guarantee their quality, I don’t have a link to them.