Starting Practice right out of School
I started practice out of school. I also maintained a job somewhere else to help pay the bills.
If you're mobile or you work from home, you don't really need much by way of business paperwork. I had to file an assumed name (aka a DBA) and get my massage license (state regulated) and that was it. That's going to vary depending on your state, though.
I also had no business plan. We did one for business class in MT school, but I hardly ever referred back to it. It held little relevance to me in real life. Maybe that was a reckless way to go, but I did it and was successful. Now, if you're going to seek funding from another source like a loan from a bank, you'll need a solid business plan.
I also never paid for any advertising, nor did I join any networking groups. While this kept my overhead very low, it also slowed my practice growth a bit. I could've had a bigger practice faster if I had.
We did build our own website (great money- and time-saver and then you also retain all the control, which is helpful) and optimized it ourselves, and submitted it to the search engine indices ourselves, and played the waiting game. It worked very well. All of our clients came either from the web searches (Google, mostly) or word-of-mouth referral.
Opening your own practice right out of school CAN be done. It's not easy, and you'll want to either be living with someone who can cover the living expenses for both of you while you focus on building your business (ideally), or you'll want to have a full or (relatively lucrative) part-time job (waiting tables, giving massage at another facility, a decent corporate job, etc) (less ideal, because that takes time away from building your business). But either way, if you have financial support from your job or someone else's, you won't feel the survival pressure and it won't seep into your massage business.
It'll take time for your practice to take off. Patience is key here. In the meantime, make sure you have your framework set up. Do you have a website? Your own intake paperwork and SOAP notes? Do you have policies and operating procedures in place? Do you have a way to record and track expenses come tax time? Have you made major decisions like outcalls, days and hours of availability, methods of payment you'll accept, etc? The best time to think these things completely through is BEFORE you get faced with situations and put on the spot. Hehe take it from someone who learned the hard-ish way a couple times LOL.
Best of luck to you, and if I can help further, please lemme know!
Hugs,
~J