A good way to determine where to place yourself is to use the National Tennis Rating Program regarding tennis classes.
The categories below are based on my own interpretation of how to place players. If you take classes with another Pro you should ask for placement advice.
The beginner class is designed for individuals that have no tennis background or are very limited. 1.0-1.5 NTRP
The advanced beginner class covers similar information but expects that you have obtained certain skills allowing for the ability to maintain drills with other players. 2.0-2.5 NTRP
The intermediate class is designed to take players into the next level of play by developing spin and directional control. Improvements in technique will also be covered. Specialty shots such as the drop shot, topspin lob, and overhead will be included. Strategy will be introduced. 3.0-3.5 NTRP
Here is a link to a description of the NTRP system that I found helpful. It should help you with a self assessment.
