I have to agree with the comments about the training syllabus.
You probably are unprepared for the real world and that is not your fault.
I would suggest that you relax. ATC will probably pick up on the fact that you are somewhat inexperienced and should be kind to you.
You could always file for a lower cruise speed than normal. This would give you more time for reflection. Fly the route beforehand from an armchair with a cold beer for amusement and work out the sort of curved balls that could come your way. Especially, make a mental note of the possible radio and navigation frequency changes which may bombard you. If you are still worried, then find someone with a degree of experience to come along and do the radio work for you. That is apt to be the hardest or most labour consuming aspect of the entire flight.
Good luck. If all else fails, just ask for a steer. On a route like that, if you are not busy then...you've forgotten something but that's nothing that FREDA won't take care of.
