Changing from an automatic to manual licence is quite a simple process.
The good thing is, you don’t have to do the theory test all over again or apply for a new provisional licence.
All you need to do is take some lessons in a manual car and once your instructor feels you’re ready, you can take the practical test!
The number of hours you need is totally dependent on your own needs. Start with the number of hours you’re most comfortable with and you can always top up from there.