I was able to get started without any training.... However, some MSC's will require that you take their training before letting you get started. The training for each MSC is important, however, as they each have their own particular preferences on how to do a couple of things.
The biggest thing, as you start, is to make sure that you set the camera in the best button hole. I will put on the shirt (before altering it) and sit at a couple of different desks. I make sure that I choose a buttonhole
above desk level by a couple of inches. (Taking under-the-table video is universally frowned upon.) I prefer the lowest such button, but we are all shaped differently and will need to choose accordingly. It's then a matter of removing the button, putting a small hole in its place and mounting the camera. You'll likely need to spend some time playing with camera angles. As a general rule, you want the camera to point directly ahead. However, folks who are are especially tall or especially not-tall, might need to change that angle by a few degrees. I use electrical tape to adjust my angle as I put my camera on each day. Some folks use Velcro...
Hard work builds character and homework is good for your soul.