Yes. They accept walk-in applicants. I was a walk-in applicant myself. The staffs are very approachable. However, don't expect for a 1-day process. You will need to wait for their texts/messages for your interview, exam and demo.
It is a non-sectarian institution with three branches. It welcomes all types of people and religion. The school feeds you with ample knowledge by giving seminars and workshops before you will be sent to the actual teaching world.