A simple rule: Once you have gained the Left Seat do not surrender it voluntarily. Expand and develop yourself in that role. Move into training and/or management when you feel ready and the opportunity presents itself. Always remember that you can establish your own business and that there are opportunities later on in life for experienced trainers and managers in other organisations (CAA, AAIB, EASA, ICAO to name but a few).
A "no-brainer" really.