A limited liability company is a legal form that can limit the liability of its owners either up to the contribution they have made or up to the a maximum agreed amount.
Anyone can form a limited liability company and it usually costs less than most people would thing. The steps you need to take are :
1. Find a proper name that is allowed (not offensive and available)
2. Register the name and choose article of association. The article of association is the constitution of the company which says how they company will be managed, who can appoint directors (what resolutions is needed ) etc. There are default articles of association and you really don’t have to prepare yours, at least in the beginning.
3. Set-up an agreement (not always necessary depending on the state) which says who is responsible for what.
4. Publish the formation of the company in a local newspaper (not always necessary-depends on the state)