The trick is, 90% of all your messages are probably with the same 1-3 persons. (spouse, friend, family or whatever.)
So just install the Signal app for these 1-3 persons on their phones, and you already have most of your communication going via Signal 👌🏼
You can use ProtonVpn (for host blocking) and the free AdGuard app for Safari content blocking 👌🏼