First of all, if you want to get into Linux, DO IT! It's truly awesome, I love it. Just get Mint, throw a Windows skin over it and nobody will notice, trust me. Honestly, it's incredibly rewarding.

When it comes to browsers, I now have the best setup I could think of: LibreWolf. It's a hardened version of Firefox. It doesn't use TOR and all websites are accesible. I use Startpage as a search engine. Granted, it can be a bit slow but it gets great results and there is a button that lets you open websites via a Startpage proxy. LibreWolf by default erases all browser data on exit so for logins I use KeePassXC password manager. It has an awesome addon which automatically fills in login fields, it can do TOTP and autofill that, too. It's pretty great.

For mobile KeePassDX is great