As far as classes are concerned go to this link
http://www.thevillages.com/Recreatio...Activities.asp
Under the section "Recreation Downloads" click the second link "Recreation News & Activities" - this is a weekly list of all activities at the recreation centers.
I attend yoga classes by three instructors, they are all different but they all ask who is new to the class and if you have done yoga before. Some classes are noted as "intermediate," don't worry about that just try the different classes and find out which is best for you.