Start with a name search on the Georgia Secretary of State website. Your name must be distinguishable from every other registered entity — not just similar-but-different.
Next, choose a registered agent with a physical Georgia street address who can receive official mail during business hours.
File the Articles of Organization online, then apply for your EIN with the IRS — it is free and usually issued the same day.
Do not forget the annual registration due each year between January 1 and April 1. Missing it can lead to administrative dissolution.