What the licence costs, honestly
Budget $575–$895. The course is the largest single variable at $200 to $500, the $175 exam fee is fixed, and the $170 licence fee covers your first 4-year term. Two things blow the budget: retakes at $175 each, and applying late, which doubles the licence fee to $340. See the full cost breakdown.
What happens in your first year
Georgia requires a 25-hour post-license course within your first year. It is not optional and it is not the same as continuing education. Miss it and your licence lapses, which is a far more expensive problem than the course.