A few random things to try
1 - Install BetterTouchTool, any gesture you want or keyboard shortcut is yours
2 - Re-enable three finger dragging sys pref/accessibility/mouse & trackpad/trackpad options
3 - Remember to turn on auto unlock if you have an Apple Watch sys prefsec & privacy/general
4 - Put dock on right hand side settings/dock
5 - Install TripMode if you need to keep data usage in check for specific 4G/WIFI networks
6 - Minimise windows into application icon (helps your dock) settings/doc
7 - Option click various status bar icons to see more options/info
8 - Disable caps lock (or re-map to something else) sys pref/keyboard/modifier keys
9 - Enable enhanced dictation sys pref/keyboard/dictation
10 - Disable file sharing sys pref/sharing
11 - Change size of sidebar icon in finder etc sys pref/general
12 - Try dark mode for menubar and dock sys pref/general