At last, the startup web site which gives no information.
"The best way to jump right in is to go through signup". Wrong answer.
Do you have a legal opinion that you are not engaged in the unauthorized practice of law? LegalZoom had a lot of trouble with that.[1] Even after some wins in court, they operate only in 41 US states, and have lawyers and paralegals on staff.
Badly drafted contracts can cause big trouble later. You need to go to a lot of effort to convince customers you know what you're doing.
[1] http://www.abajournal.com/magazine/article/latest_legal_vict...