Type of Business Entity

I’m curious what is the most common type of business entity for online coaches. Do most operate as sole proprietorships and purchase insurance if there is a liability concern? What are your thoughts about the benefits of forming an LLC vs. operating as a sole proprietor? I realize that I need to consult a professional advisor, just trying to understand what common practices are for those launching their business. I was considering an LLC, but thinking that multi-state operation may lend complexity to an online coaching business? Thanks!