Traffic in LA is bad.
Are U staying in LA or suburb?
parking in LA, Torrance bad imho, singapore is bad imho too. LOL
put to perspective singapore size is 278 miles2, LA is 469 miles2, Anaheim is 50miles2. LA-Long Beach-Anaheim metro is 4850 miles2.
with regards to driving, on top the left hand drive. best to read the handbook. there are some things u need to know. some ppl say easy so ppl say hard. most ppl I come across can do it just pay extra attention 1st day or 2.
https://www.dmv.ca.gov/portal/dmv/detail/pubs/hdbk/driver_handbook_toc
San Diego Zoo, San Diego Sea World is an option.
nature, not going to find in the city. venture out and be driving a bit.
- Joshua Tree National Park
- Sequoia National Forest
Not a bird watcher, if U are passionate about it can hire a guide (
http://cooperecotours.com/)
if U just want good spots to go and explore on your own, google and check out reviews.
theme parks the usual Disneyland, Universal Studio.
beach u get Malibu which is like 1hr away from LA.
sure U can go whale watching, u have to check the season. I went whale watching in Hawaii.. well.. you need a Bino or a very good zoom lens. the animal is not going to any where near u. Boats due to safety reasons dont go close as it risk capsizing.
https://www.timeout.com/los-angeles/things-to-do/where-to-go-whale-watching-in-los-angeles
not big on shopping then Citadel Outlet is the way to go if U are really in LA.
but if U are like in riverside, then Ontario Mills or Dessert Hills.
but then prices in USA is way cheaper than SG. I have seen not big shopper in SG spending more time in States just because prices are low. If U not tempted by cheap deals half a day is good. some ppl don't even like outlet as they view them inferior quality. if U only want make in USA, Italy and no china skip outlet.
cost of uber is expensive. rides in USA cost more than Singapore. labor cost is expensive.
if not comfortable driving over 3hrs, then U can fly. Say fly to vegas and then take a tour to grand canyon. that is reduce driving if you not comfortable.