Application deadline is February 1st of each year. You need to be accepted into the program, if you are not a WU student you need to apply to the University as well.
The OTA Program starts in the Summer session.
No, you may start the program (after formally admitted to the OTA Program) as a high school graduate, there are no prerequisite courses necessary.
Any classes listed under “Required Correlate Courses” & “University Requirements”.