Hi, welcome to the forums!
Given that March 26 is currently an
open date (no planned private events or annual pass previews) for The Wizarding World of Harry Potter, I'm going to bypass all traditional notions on how to navigate the park and say go to Potter first. Arriving at park opening is essential, and I suggest immediately hitting
Harry Potter and the Forbidden Journey (and
Flight of the Hippogriff if you're a completionist). The first fifteen minutes or so of park opening will hopefully allow you to reride Forbidden Journey multiple times.
I then suggest hitting the Lower Lot to ride
Jurassic Park,
Mummy and
Transformers (the latter of which is their newest addition to the Lower Lot, which means it may garner the heaviest wait times of the day). Finally, head to the Upper Lot and complete
Despicable Me,
Simpsons Ride and the
Studio Tour as your day frees up. Because shows are scheduled throughout the day (and usually require 15-30 minutes of queuing up before posted show times), we suggest prioritizing rides - specifically the Lower Lot and Wizarding World - above everything else when you arrive. Once you finish both, you'll be able to enjoy the park at a more leisurely pace, watching shows and experiencing the Upper Lot's rides. You'll still have to wait, but hitting both Potter and the Lower Lot will expedite your day.
If you'd like a general overview of the park, I suggest you head over to our
Start Here guide which gives you a general look at the park.
Good luck!