Ente offers E2EE photo backup (and a 2FA app). If you used google photos before, ente offers one gigabyte of photo data for free.
Mozilla Thunderbird and ProtonMail are some good apps for managing email. I've also heard good things about FairEmail but have not used it myself.
Me too. I switched to PIA recently and I have not had any major issues. The speeds on European servers are a bit inconsistent, but that's it.