We had a great stay at Kylee’s place in Mission beach. The place is small but has everything we needed, was in great condition, has a fully equipped kitchen, and is in a great location. There’s a shop a few blocks down that rents surfboards, and you can walk from there to the beach for some great beginner waves. The boardwalk steps from Kylee’s place is perfect for biking / rollerblading / walking / running. There are places to eat nearby, but I would recommend having a car so you can explore more of SD.