Is anyone on this forum aware of stick on label sets being offered for sale. I am referring to labels that would identify the joystick functions at a glance. I am a new pilot flying a Spark with a RC and Android phone via WIFI. Just curious.

Interesting question...I would recommend using the Flight Simulator within the DJ Go app for a few days prior to flying.  This will allow you to get accustomed to the stick movements

You could try DecalGirl I suppose? They have a skin for the RC, you could customise and design with your own labels and they will print and ship to you.

Left stick - up/down/around
Right stick - forward/backward/left/right
Fly for one or two flights and it will stick

You will get the hang of it, with time and practice of course. But always do take note and be aware of where the AC is pointing i.e either maintain VLOS or note from the arrow in the DJI Go 4 app.

For sure practice in Beginner Mode, use the Flight Simulator and soon you will be flying without looking at the controls.

Best to get used to it without labels. If you have to look at the RC and read labels to know what to do, time will catch up with you and the results can be bad.
Imagine having labels on the steering wheel of your car.
You need to practice until reactions become automatic reflexes.

I used a dymo label printer. I forget the controls after not flying my spark for a while.