I would say that Apple isn’t as bad as Google. But they are not good either. The best way to be private is to educate yourself so you’ll learn what’s ggod or bad for you.
In general everything that is cloud based like iCloud or GoogleDrive has to be avoid. For me a degoogled-phone is good enough (CalyxOS)
Unfortunately Firfox’s Gecko Engine is less secure than chromium, probably because of Google controlling Android. If you really want to use Gecko go with Mull if not go with Bromite
Not that I am aware of.