I highly recommend renting a pair of street bikes at:
San Diego Bike Shop
619 C St, San Diego, CA 92101
Then ride down to the Midway and take the ferry across to Coronado. Either do the full loop below, (download it into your phone's Google Maps app) or just ride down the strand bike path and back up to Coronado. Either way ride around Coronado on bicycle.
https://www.sandiego.org/articles/bi...e-bikeway.aspx
The entire path is very level and if you budget several hours plus lunch in Coronado you will have a great time.
You can also bike up and down the shore around your hotel. The boardwalk on Pacific Beach, Mission Beach and Mission Park are very pleasant level places to bicycle.
If you like seafood and or mexican food eat at:
Oscar's Mexican Seafood on Emerald in Pacific Beach.
Your hotel is in a great location. Definitely, use Yelp. There are a lot of great independent restaurants in Little Italy and the Gaslamp. I recommend using Uber, especially at night. Anywhere in Little Italy and Gaslamp District to your hotel will be about $7 each way.
If you have time, the USS Midway museum is worth visiting.