First thing I practiced religiously, before ever putting an open edge to my face, was to learn to use my left hand. I shaved with my DE's, until I felt comfortable shaving the left side of my face with my left hand. Stropping practice is also well-advised. I was literally pivoting my straight on the EDGE. How stupid was I???
Also, I ignored the advice about starting off with a cheap strop, because you WILL cut your first one up. I did too.
Anyway, it's 4 years+ later and I have since become quite adept at straight shaving. You will too. Good luck.