Thank you, it does help! Luckily I was called for an interview today too
Hopefully, we both get in! Sounds like you are a great candidate! It's not easy getting OT shadow/volunteer hours but you have a lot... not to mention great references which is a big plus!
I think you'll do great in the interview since you have plenty of background and are knowledgeable about the field. Google potential OT interview questions... If i can find the link I did before I'll upload it for you. Almost 100% chance they'll ask you why you chose OT, what you learned/challenges while shadowing so be comfortable with your answers there. Try to have a couple questions at the end of the interview for them that shows you specifically know their program (look back on their website). It's a super short interview so they may not have too much time to go into great depth but try to tell them what you told me about tests not being an accurate measure of your ability and how you shine elsewhere
I heard it's good to dress professionally but not be overdressed (more dressed up then the interviewer)... other people like to wear suits so I think it depends on your personal preference. I hope that helps some
Let me know how your interview goes!