It is generally legal to drive a friend's car with their permission and your driver's license, as long as you are not a licensed driver. However, it's important to note that the car owner's insurance will be the primary coverage in the event of an accident, and your own insurance may not cover you. Additionally, if you are driving under the influence, you may face legal consequences and the car owner's insurance may not cover damages caused by your actions.
It's also worth noting that some insurance policies may have specific requirements or restrictions for driving someone else's car. It's always a good idea to check with the car owner's insurance provider to see if there are any specific requirements or restrictions that need to be followed. Additionally, if you are planning to drive someone else's car regularly, you may want to consider getting your own insurance policy that covers you for driving other people's cars. This can provide you with additional protection and peace of mind in case of an accident.