Great stay! Federico gave some great recommendations for a first-time solo traveller in Valencia. It’s always good to do some personal research too, but if you like walking this is the place for you! It’s a bit far from the old part of Valencia but very close to the beach and the park that runs the length of the city. Nice quiet street, convenient and safe even for late night walks. Also a very clean apartment, with a good amount of city ambience as background noise.