What you are feeling is natural and relatable. You need to find a balance and define your threat model.
Privacy maximalism and/or FOSS maximalism etc is natural impulse when you first begin to grasp just how quietly exploitive, invasive, and commoditized the modern internet is. But it also leads to burnout and can be isolating if you are too rigid about it.
Define your threat model, and your priorities. Accept that perfection is not attainable and do the best you can. It’s less overwhelming.
My advice:
pick ONE easy to use and well established/reputable messenger that is privacy respecting (Signal is the obvious choice in my eyes). Make it known that this is your preferred messenger (and have a short, not super technical and not super political explanation why you prefer it). Try to get the people you are closest with or communicate with most, and the people you think are most likely to be interested to start using it.
Then, have a preferred fallback or two (basically the “least worst” mainstream option). Depending on your circle, iMessage, RCS, WhatsApp, or Telegram might be that fallback. None are anywhere near perfect but they also aren’t the worst and sometimes you have to meet people where they are.