To do list

• Learn MacOS keyboard shortcuts; write them down and search when necessary;
• Use Homebrew to install applications;
• Prevent the ALT key to generate special chars when used in combination with another key - change keyboard input source to Unicode hex input;
• Speed up cursor movement while kepping an arrow key pressed - in Keyboard settings change Delay until repeat + Key repeat.

Apps

• Rectangle - move and resize windows using keyboard shortcuts or snap areas;
• Flameshot - better screenshot tool;
• 1clipboard or copyq - clipoard manager;
• alt-tab - enable Windows-like alt-tab.

Remove quarantine attribute

When you get an error that will prevent you from opening an unsigned app (like "CopyQ.app" cannot be opened because the developer cannot be verified. macOS cannot verify that this app is free from malware.) you need to run from command line:

sudo spctl --master-disable && sudo xattr -rd com.apple.quarantine /Applications/CopyQ.app && sudo spctl --master-enable

Replace /Applications/CopyQ.app with the app that is reported in the error message.

Bash script which automates the above command: https://gist.github.com/cristianradulescu/5bb29875c8c771e12710e00824c01e74.

Other things to try - Bill Mill's awesome setup script.