Are CSC cameras such as the Sony A6000 good for people wanting to move up from an iPhone camera? But you don’t want the bulkiness of a DSLR.
Yes. It uses the same kind of censor as most SLRs. What you get with the SLR and loose with this camera is "handling." the A6000 is controlled from a menu system so to change anything you are working head own, eye off the subject. With an SLR most controls use physical knobs, wheels and buttons ou can work with no need to go into a menu and select options. It sounds small but having to take your eye off the subject and futz with menus picks just does not work for action photography, say in sports or wildlife. But most people never do that. Most casual photographers (and pros working in studios) are doing "set up" shots
One other important thing: If this is your first interchangeable lens camera you really do want to think hard about what lens you want. These camera are typically paired with rather slow f/5.6 zoom lenses. This keeps the cost of the kit low but look at other camera that advertise f/2.8 or even faster.
Even my old iPhone 6 has an f/2.2 lens.
Sony does offer a good selection of lenses and you do not need to settle for their lowest cost option. There are also excellent third party lenses you can get. You can get what you want or need. Just pointing this out because so many beginners don't even think to look at the lens and it matters more then just about any other feature.