My suggestions for SD are Sea Port Village (unique shopping), Balboa Park (great museums), a drink at the beach bar at the Hotel Del Coronado (you can't afford much else there), and perhaps a tour of the lighthouse at the end of the point near the Hotel Del (can't remember the name).
Also the Scripps Institute in La Jolla.
And if you are there at the right time, the annual Over The Line tournament at Ocean Beach is not to be missed. One of the wildest beach parties I have ever witnessed.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI