Hi, and welcome! While there's no guarantee that someone will make a journal entry on your books, there are lots of ways to improve the odds. As Camperfan suggested, reading the FAQs and other information is a good starting point. You might also like to browse the Site Watch forum, where people post interesting catches - it's reassuring to see the books that *did* get caught, and you may get some ideas about release spots too.
I like to leave books in all sorts of places, from public benches or statues to official book-swap shelves of various kinds. The Little Free Library movement offers a lot of swap-spots, and I see there are several in Los Angeles, with one of them showing up on the current "go hunting" page as well:http://www.bookcrossing.com/---/2128
[The Little Free Library web-site's own map can be used to search for LFLs in specific towns: https://littlefreelibrary.org/ourmap/
If you think you might be interested in swapping books by mail, you can check out the "Random Acts of BookCrossing Kindness" forum. It's a way to offer specific books to people who may be wishing for them - but I do recommend doing some wild releases too.
Hope that helps, and that you enjoy BookCrossing!