Years ago I rode a Vespa scooter, and have since ridden motorcycles of all sizes. Scooters are very easy to ride, and will zip you around town, and in and out of your driveway and parking spaces very easily. Even a small car will seem cumbersome in comparison.
You are vulnerable on any kind of motorcycle. Always be defensive. Never assume other drivers see you. If you are about to cross the path of a car at a stop sign, make eye contact with the driver to be sure he sees you and to determine his intentions. Same thing if a driver is about to turn left in front of you (you are driving toward him). Many, many accidents happen is these scenarios because the driver just didn't see the motorcycle.
A helmet is a must, whether it's the law in your state or not.
Among the machines I've had was a Honda 110cc trail bike...light, maneuverable, good on gas, not that different from a scooter. Wish I still had it.
If you are careful, cautious, defensive, you will have fun. Happy riding.