As you are 16yrs old at present by all means continue with gliding, if you are thinking of A levels and University study aeronautical engineering, join the university air squadron and take it from there. If university is not your aim and you haven’t got rich parents, glider towing is a good place to start, do check up on overseas employment rules, a great many countries are now only allowing “citizen” pilots to be recruited. If you are determined and talented you will make it but it will be hard.