Amcapt89
if you get airborne knowing you might not get your requested flight level or exact route, then you should have no problem with your flight.
Which is exactly what happens with commercial traffic when it gets busy on airways anywhere in the world.
Bear that in mind before you get airborne and you will, hopefully, have an enjoyable flight knowing that you will be treated with the same professionalism as all other users of that airspace.
Let us all know how you got on.