The target line is a very important factor when it comes to club fitting. Learn how your swing can impact the putter that best fits you.
Putters can be deceiving. Looks don't always mean that a club will work best for you. Learn how a putter is fit to your swing.
Forearm rotation will make your swing more difficult. Practice directing momentum.
Using tennis as a way to practice golf is a great way to get a better feel. Learn what the change of directions feels like.