You would be best served bringing these concerns to an attorney. An experienced business attorney can walk you through any legalities that need to be covered before starting your business. They will also be able to guide you through the registering process and all paperwork that goes along with it. And when you are ready to take on investment, that attorney can setup your fundraising process to ensure that it works smoothly.
At LawTrades (a web startup ourselves), our business attorneys have experience setting up and registering startup companies. Our attorneys have helped many other companies get started, visit ourto see how we can help you!