In some states, you may be able to get advice from the Chamber of Commerce and from agencies supporting small businesses. Here in North Carolina, we have to incorporate with the Secretary of State, and you may be able to find a person in those administrations who can at least put into normal English the differences between the two.
Personally for our business, we have chosen to be an S Corporation.
I totally agree with Joanne on this. Make an appointment to speak with a CPA and/or business attorney. A lot depends on your specific circumstances, so, in my opinion, no one else can really answer this question for you other than one of those professionals in consultation with you. That is probably your best plan of action.
I personally use an LLC.
If an LLC is an option for you, I would learn about it and keep it under consideration. Its not hard to determine the one that will benefit you most if you have a solid business plan already. If not, do that 1st. Then find a trustworthy accountant and knock heads with them. You’ll be glad you did.