To answer your question regarding private practice, here are some steps for you to consider, review the NSRP Standards for Providers of Psychological Service, in the context of private practice. As well as review the below PDF for a listing of relevant legislation and other guidance you might see through the lens of operating a clinic:
https://www.ns-rp.ca/downloads/Binder_Standards_Legislation_Guidelines.pdf
As well, we would suggest that that document on starting and operating an independent practice might be helpful:
https://cpa.ca/cpasite/UserFiles/Documents/publications/PAA%20Guidebook.pdf
NSRP does not have a list of mentors for private practice. However, you may wish to reach out to APNS, They havena private practice committee and do keep lists of volunteers for various interests such as peer support, so they may some may be able to consult with you on private practice.