I don't think anyone could put out everything you would need to start, or tell you if you have enough experience. I can tell you it's a tough business to break into and you have to be ready to put in time and money.You will of course need to get all the licensing, go through business registrations in your state, purchase software, research clearinghouses, build a compliance plan, contracts, marketing materials, office equipment such as fax, copier, etc.
The best advice I can give is to put together a good business plan as a stepping stone. Once you have that done you can begin a marketing plan. Since you have on-site experience you can also put together a resume which will help you in your marketing.