I've kinda got used to Fn-Left and Fn-Right for home and end now. It has taken a very long time though.

For those ctrl+a and ctrl+e are the way to go.

Dunno. I prefer the mod+arrow keys or terminal shortcuts to 4 new keys

I love that on macOS all in-app shortcuts are consistently Command+Something, like Q for Quit, W to close a window, and Control is usually for system-wide shortcuts, and Shift/Alt/Option is exactly what it says on the tin: modifiers for alternative behavior. You usually won't see Alt/Option on its own for any shortcut..

..while Windows is all over the place. Like why the heck is Alt+F4 used for quitting an app?? What does 4 stand for here? Death in Japanese and Chinese!?