I’ll start by sayng I’ve driven in the US and Canada several times so I’m coming at it from that perspective. LA traffic can definitely be a bit of a shock but being on the wrong side of the car and on the wrong side of the road kinda makes sense lol And GPS is a game changer, so much easier than when one of us was trying to navigate using a map from the passenger seat! For us, family of 5, car hire for our entire trip is cheaper than return airport shuttles so it was a no brainer. We aren’t doing as much in LA as you are, we will probably leave the Anaheim area for two days out, but having the car will be super convenient for shopping, groceries, going to a local baseball game etc. We chose a property with free parking because we will have the car. We will be visiting a few places that require paid parking but it’ll still be cheaper than Uber etc. LA is not known for its ease of getting around but it does sound like you’ve come up with some good alternatives