Everyone has the same worries. Do the coursework, if you don't pass the PT first time, revise, do it again. Go through the question bank on the app or online, once you have seen all the questions try practice exams without a time limit initially, then set the timer. Try and get yourself to a pass standard in all papers. If there are gaps in your understanding we will work on that on the revision course.
You'll find that most of the people with you in the room on day 1 of the revision course have the same doubts and fears - its normal. If you have done the distance learning work and had a reasonable stab at the question bank you should be OK.