I don't remember learning the difference between left and right, so I don't know what my anchor for that difference was. But I remember the halfway point in learning vertical and horizontal. When I was unsure which was which, I would hear the voice of a marionette saying, "Full boost, vertical!" and all would be solved. Even now, if I start to second guess myself, I hear the voice.
I don't remember the name of the television show, off hand. It was probably something like Supercar. Yes. Wikipedia confirms that there was a TV series called Supercar and the images match. Produced in '61 & '62, wiki says it used supermarionation. I'll follow the link after reading the article. Nostalgia time. Hold on for a sec.
The supercar in Supercar could act as a hovercar and as a jet. It could also take off and land vertically, hence "Full boost, vertical!" The wiki article on supermarionation is interesting, but it's not a personal memory, so you can look for it yourself, if you like. The most popular supermarionation series was Thunderbirds. I remember them.