Although an unconventional swing, emulating Lee Trevino's swing by focusing on his right side and the way he came down and straight through the shot, tracking the target line, is a great idea
How the wrists release after impact have a tremendous result on your power and accuracy and is rarely discussed among teaching professionals
Place a shaft just outside your target line and slightly behind your shoulder to practice your swing plane, this will help you keep your takeaway on plane and also stop you from coming over the top on the downswing