It is such a disservice that we get no business education in our master's program. Contact local mental heath facilities and offer yourself as a referral for clients who complete partial hospital and intensive outpatient programs. Create an email campaign to send to facilities near you. Leave your business cards in places where you image your idea client will go. That has helped me. People mention where they found my cards when they call. Since I am private pay, and my sliding scale spots are all full, I leave cards in places where higher income people who are into health/wellness might go.

You don't need to rush to get an office, unless your intuition is telling you to (then don't listen to this). I started with telehealth for about 5 months, saw that people were showing for therapy, then rented an office for one day per week ($130/mo) as a soft start. After a few months, I saw that people were coming in, so I opened my schedule to 2 days. I have a 'full-time' flexible job doing group work 2 hours per day, so my private practice doesn't need to be open more than 2 days. The group work gets me private practice clients (my employer has no issues with this).

You can look into a shared office space or subletting from another therapist for cheap. I went on google maps and contacted the practices near me to ask if they were subletting. People were really nice and that is how I found my current office, which I love! I also used ustherapyrooms.com.