Personal Security

Hi, Recently a hacker got into my personal email and text messages. I believe that someone I know hired a professional to do this.

I have taken steps to secure everything as much as possible. I switched to ProtonMail, have strong passwords, 2FA, and I have a separate laptop (Mac OS Catalina) that I now use for sensitive things such as online banking.

How would you protect yourself from this? Do you have any recommendations?

Please buy a new PC. Install Ubuntu attached to magazines and other appendices.
Enter the following command in ufw while isolated from the network.

$ sudo ufw default DENY
$ sudo ufw enable

Shut down once.
Connect to a network.