I am trying to perform a graft on a small maple tree in my yard as part of a learning project for a class. I am wondering what type of graft will be the most successful in June and accessible to a novice like me?
What Is the Best Graft Type to Use
Grafting is one of the most fascinating areas of plant propagation. The type of graft you use depends on what you're trying to achieve. An afternoon of googling "grafting" will give you volumes of information, but you might like to start here: https://www.gardeningknowhow.com/ornamental/trees/tgen/grafting-trees-what-is-tree-grafting.htm
Here's some interesting material on maple grafting: http://depts.washington.edu/propplnt/Chapters/Layering%20and%20grafting.pdf