I have been taking lessons/working with a Master Instructor in an effort to get certified.

In addition to him helping me with my casting, I have also learned to analyze my own cast and determine what I am doing wrong just by looking at the cast and how the line ends up on the water.

Usually - in California at least - the lessons seem to run around $50 for an hour. I think they are well worth it. You can also muddle your way through it.

Just by posting the questions suggests at least that you are unhappy with some aspect of your cast and want to improve. Sometimes you need someone else looking at your technique.