How do you make your own forms?

I got offered a position as a 1099 and was told to make a PLLC. They give me an office, therapists, a scheduler, and a biller. I'm being asked to create my own intake forms, no-show policies, etc. I know what I want on there in concept, but I don't know what legal jargon and stuff I might need. Do you just copy and reword others that have been written? Is there a central document hub I can utilize?