I convinced my “non-techy” partner to try Firefox after a fresh OS install and she had zero issues adjusting. I wouldn’t even call it an adjustment in fact, she just continued using it the next day and never ran into a single problem. A lot of the reasons she still used Chrome were just down to complete misconceptions about how to use a web browser, like thinking she needed Chrome to be signed into her Google account or that she would lose all her bookmarks and stuff if she switched. I also got my mum to switch last year - again, the only reason she used Chrome was because she was confused about the difference between Google Chrome the web browser and Google the search engine. Google has a monopoly on these people without doing anything deserving with their product, it’s just pure marketing and market dominance.