Ready ?

For the theory test, use reliable revision materials that allow you to take several mock tests and see how well you consistently score. Those aids should also tell you which areas you need to practice more.

For the practical, take the advice of a current professional, like an instructor. They should know what the test examiner’s looking for. That’s a basic competence in car control, plus anticipating what others might do. You'll pass if they see you can make a sample journey, safely and efficiently, without help.

Make sure you know the standard expected. You'll know you're ready if you're making few faults.

You could also see some mock tests, or get an independent assessment. But be sure you know who made any video or gave you that advice, and why.

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