Starting a business help

Hi everyone, so I am thinking about starting a business in the mental health and wellbeing space combining mental health, creativity and spirituality to help people on their healing journeys.

I already have a degree in psychology, masters in arts and a background in marketing and education.

Would you recommend doing a coaching certificate to add onto my knowledge or my previous experience is enough? I've had a look at some programs but i'm not even sure which one I would do. Is it a life coach? Wellness coach? Spiritual coach? Coaching would only be an add on to my business it won't be my main thing. I would like to work with groups and people.

Any help and advice would be appreciated! Thanks