If you do not currently have a policy, you must set one up you can drive the car home:

Many insurers provide a grace period (usually 7 to 30 days ) where your new car is temporarily covered under your existing policy’s highest level of coverage.

You can often just show your current insurance card as proof of coverage to take delivery.

If you already have auto insurance, the transition is typically straightforward:

When buying a new car, you must have insurance in place to legally drive it off the lot. While most dealerships require proof of insurance before handing over the keys, the exact process depends on whether you already have an existing policy or are a first-time buyer. Key Steps for Existing Policyholders