Expect a wave of fingers cut off and eyes picked together with a stolen phone? Or kidnappings more likely?
I've been happily dualbooting Win10/Mint for years on the very machine I'm writing from. Zero issues with boots, GRUB, no need for flatpaks, both systems work fine, both configs heavily customized.
For starters you might want to check privatezilla and bloatbox by Bel: https://www.builtbybel.com/apps https://github.com/builtbybel
They haven't been trying to sell me anything and setting up their own ad system independent from Google is a good thing, esp. when it's transparent and optional. Brave has its problems but force-feeding users with ads or crypto isn't one of them.
Mozilla deals with Google
With how much revenue comes from those deals, we might say it's practically financed by Google. FF is more Google than Chromium-based Brave if you follow the money.
Yes, you can.
There's no push. You can completely ignore that part of Brave, which I do.
https://f-droid.org/en/packages/org.dslul.openboard.inputmethod.latin/