LAX is a big airport and LA in general has heavily congested traffic.
TSA are bozos and you'll have to take your shoes off, belts, necklaces, basically almost everything and you might as well take your clothes off because they'll be looking at you naked with their body scanner anyways. Make sure you review their website thoroughly for what you can and can't take aboard because if it's not approved they'll confiscate it or make you throw it away. You make it through that (I didn't make it through without being groped the last time), then you find your gate and it's more pleasant from there. Except planes are often cramped, and if you're around 6 feet or taller it may be uncomfortable. But it's fast and it's the safest way to travel. Though at LAX if you have any checked luggage you will be waiting awhile for it.
And LA itself is fun but overwhelming because it's so big. The metro area is actually numerous cities that are crunched together, with other cities and metropolises also within that large junglish cluster-mess of steel and concrete. And there is lot's to do, people are more laid back and accepting of differences, there is so much to see, and it can be a very thrilling visit. But it's also very expensive (LA and San Francisco are way more expensive than the rest of California), and there are a TON of people. That you may need to prepare yourself for. I struggled with my social anxieties when I first moved here because there are so many people here, and I don't even live in LA.