It’s never too late to learn. Of course, I’m not saying you must learn, but if it is something you want to do, it’s absolutely never too late.

Precisely. You don’t pay an electician to dig a hole. You don’t let a machine operator do electrical work, and so on.

You should start indicating as you pass the exit before your exit.

I’ll give you a better tip for all traffic interactions; look at the driver not the car. You can see where they are looking and what they plan to do in almost all situations. You can even see if they aren’t looking and have no plan.