Leave now. I was using Windows for years until I finally made the full switch to Linux last year. I dropped iPhone too as well for GrapheneOS. I may honestly just keep an emergency phone on me and store it in a Faraday bag, I don't see a point of carrying around a tracking device.
Use Signal Desktop and have your co workers/family call you there and/or use email. On my resume I heavily point out that I highly depend on Linux and avoid Windows. Its up to them if it will be compatible with the line of work such as becoming a Help Desk in IT. Obviously, if you need to use Windows at work, only use it on your work PC. Eventually I'll become a Linux System Admin so that'll help out. I'm so much happier too as I stopped using social media like Instagram, Snapchat, etc. You don't need that proprietary garbage.
If you want to go extreme buy an X60 and flash Libreboot on it. Also, check out the LibreCMC R1400 router by ThinkPenguin. Achieve that Richard Stallman level freedom.
Make the switch, you won't regret it.