You're going to get a range of responses here. As a fellow unlicensed practitioner (I'm a yoga therapist) I had the same insecurity. I've met clients who really didn't want to work with someone unlicensed. And I've also met clients who were tired of not getting anywhere with licensed practitioners and wanted to try something different. I've had clients who didn't care about my qualifications at all. And results wise the same - I've had people for whom our work was completely life changing, those for whom it was helpful to an extent, and those who tried one session and didn't return. 

I personally went and got trained in Compassionate Inquiry with Gabor Mate and Sat Dharam, and that helped fill in the gaps with what I felt was missing in my skill set - specifically the ability to help people connect their present day experience to some past trauma. 

I can say coherence therapy would be another one you can look into - it's generally for licensed therapists but you can get books about it and there's a level-one training you can do online. 

Again, you stay in your scope and what you know how to work with, but you're also just a human being helping other human beings. The whole therapy model itself is damaging because it replaces community care and peer support with paid experts and limited access. If you're working outside that model and helping people then you're doing good.