I notice your location seems to be in Ontario, Canada. Being in the U.S., I'm not familiar with the mental health and/or substance abuse treatment opportunities in Canada. Maybe a place to get more localized information regarding your question would be college or high school career advisement services. The ability to provide services to persons with mental health or substance abuse problems depends a lot on the amount of education, intern training, certifications and, in the U.S., state licensing requirements. Providing tele-health services, for example, most likely would require the same sort of licensing or certification as doing in-person, in-clinic or hospital services. In general, any sort of "human services" requires some sort of licensing, and getting qualified to apply for a license means meeting certain minimums of education and training.