No, you cannot bet on FanDuel if you are 18 years old. The legal gambling age in most states where sports betting is legal is 21 years old. FanDuel adheres to the legal requirements of the jurisdictions in which it operates. It is important to always check the local laws and regulations regarding the legal age for gambling in your specific location before attempting to place a bet. If you are under the legal age and attempt to use FanDuel or any other gambling platform, you may face penalties and be prohibited from using the service. Always gamble responsibly and within the legal framework.