As the other posters say, start with your PPL. If you get on really well, and love it, you might want to consider instructing. I know several people who've turned to instructing in their (semi) retirement. It's a cheaper goal to aim for than CPL/ME/IR, and the resultant pay is considerably less too, but you have a marginally better chance of getting a job as someone of a mature outlook...
Good luck and enjoy your flying no matter what!