Hi Ashleigh, I'm new to the community (just starting my 2nd year in Clinical Mental Health Counseling) and I am a Registered Drama Therapist. My understanding is that you can indeed use some of those interventions, but you need to make sure, first, that you have received training in the interventions that you would be using, and second, that during informed consent and as you advertise yourself, that you clearly state you are not a registered music or drama therapist, but have received some training in those areas. I hope that makes some sense, and I would be happy to chat with you more about this!