Very relaxed. Be yourself and have a positive attitude, they just want to see a reflection of the attitude you'll have when teaching. After the interview, they will most likely ask you to do a short demo of your class with them.

It was online and very short not many questions asked which was odd, they accepted me then I started working almost 4 months after the interview but we were doing nothing because the gym was under construction and did not yet start to welcome members, then after almost 40 days only they told me that i dont have enough certifications and someone with more certificates applied and they want to replace me..