After an afternoon sewing lesson with my mom on Saturday I was able to accomplish this all by myself last night;
I work with a seamstress who typically fabricates all of my custom window treatments, pillows, cushions and more for my clients. But since I'm trying to do things on a tight budget around my own house, the cheapest way to do so is to do it yourself!
My first go around went well, although I think I need a little larger of a pillow form to insert into these (It's an 18" pillow cover and a 17" pillow form.) I'm still learning the ropes but am super excited that I can now sew my own pillows!!