Once your driving standard has reached a suitable level, you will want to book your Practical driving test online, but always check with your driving instructor before doing so.
The timescale for bookings can vary one month to the next depending on the number of other learners applying around the same time. You should not just go ahead and book the test before checking that a car will be available first so coordinate the booking with your driving instructor.
Check the cost of the practical driving test here.
Note: To cancel or reschedule your driving test you must give 3 clear working days notice or you'll lose your fee!
Visit the official GOV.UK website for more information.