I will second the others that only suggest Signal or a variant of Signal like Langis or Molly. Everybody has each other's phone numbers, go with Signal so people don't need any other contact information.
Poilievre cannot be defeated if you attack him from the left. Everything from legacy media is to the left. Poilievre very much can be defeated if you hit him from the right.
Proof that she is a con and is lying to the country is she won't do interviews with anyone who will point out her 5 years of contradictions and ask her ti explain. She will only do interviews with people who recieved government subsidy.
If she really is against elites, ask if people have a protected right to protest in front of parliment against the federal government.
For which ROM to use, I believe any ROM based on AOSP will suffice because even that will fully eliminate all Google tracking, I think LineageOS is the worst one. I do recommend Pixel since you can lock the bootloader after flashing it. You could try CalyxOS.
For privacy, I only use phone for communication, I don't use cell data service so no internet when I'm outside, no messaging, until I connect to wi-fi again. In F-Droid I turn off all anti-features in settings, and everything I install is from F-Droid. No social media and no Aurora store to use Play Store
I will second the others that only suggest Signal or a variant of Signal like Langis or Molly. Everybody has each other's phone numbers, go with Signal so people don't need any other contact information.