Recently got interested in staying more private, are my app/OS choices good?

Im using Protonmail and Keepass for few years now. I wanted to make some changes recently. Can you tell me if those choices are good and if maybe I should use something else?

\- switching from old, cluttered Windows 10 PC to Thinkpad with Linux, probably Debian
\- Protonmail
\- Keepass
\- Messenger to Signal
\- Google drive to pCloud
\- Using iOS

app can debian good keepass linux old privacy private protonmail thinkpad windows windows 10