I learned how to use a baitcaster in 1989 and can tell you it takes a lot of practice along with some trial in error. Since I have been fishing with one for so long I would not be a good teacher as I forget how to cast, it is just muscle memory now.
Things I has learned over the years though are; cheap baitcasters are just that= cheap, trying to learn on a $30 baitcaster is frustrating and counterproductive. Now this does not mean you need a $500 Steez reel to learn on! Anything in the normal retail price range of $100-150 is fine. Brand and model is a matter of personal preference and if purchasing a new reel go to BPS to handle them before you buy.
Steps to avoid professional overuns (aka backlashes); fill the spool only 1/2 to 3/4 full, pull out a cast length of line and place a piece of electrical tape on the spool. Use cheap line in 10-12lb mono until you get the hang of it, otherwise it gets expensive.
Allen