Yes, PT school will be hard - but your job will be to be able to reflect and change things around quick. Understand that you cannot necessarily study the same way for each class. Work towards your strengths, but those strengths may not prove best for all classes.
You will have multiple sources available to you - professors who are easily accessible, students who will be struggling alongside with you, and your fellow upperclassmen.
If you encounter poor performance or mistakes - reflect on it, identify the error, correct it, and move on.
My personal motto with PT school has been 'just keep swimming' - do not get stuck in the loophole of 'if I study more my grades will improve'. Study smart, not study more. You will be asked to build upon material, and all of the classes will connect in some way, shape or form - in the early stages it may not seem like it but as you move on with the curriculum you will soon get to see the fruits of your labor emerge.
I wish you guys luck 😀 you can do it!