Di worth it kasi yung wear and tear sa joints mo via high impact na exercise like jogging. Usually ang best e kumuha ka ng trainer o maghanap ka ng kaibigan na may alam sa tamang pag exercise, lalo na kung plano mo magbuhat. Importante kasi na turuan ka ng tamang form para di ka ma injure in the long run.
Before going to the gym, consider doing simple bodyweight exercises first, like unweighted squats, leg raises, pushups. Try looking for a copy ng Convict Conditioning ni Paul Wade (check mo baka meron sa ebooks dito). It's practically the bible of bodyweight exercises.