If, as you indicated, you have very little patience, then calibration is most likely not for you. All that detailed instructions or even a video will do is give you a better understanding of how the process works. However it is unlikely to speed up the process, and it will not be a magic bullet that will easily and quickly allow you to calibrate your lenses.

Calibration requires a lot of discipline. You need to perform multiple structured tests and observations for each of the large number of focal lengths and distances available for zoom lenses. You need an appropriate target and must test at various defined distances depending on the focal lengths used by the tap in. And you need to be able to get repeatable results which means multiple tests.

The testing process is arduous, and time-consuming, and tests should be performed on a tripod using the viewfinder. That is an important factor because calibration issues are more often a result of using a camera's AF sensor through the viewfinder rather than the camera's main sensor which is used in Live View. It is a process not meant for the faint of heart. It can take a number of hours of intense effort to calibrate a single lens.

A very important consideration is that when using the Tap-in device you are calibrating the lens itself by modifying it to work optimally on your specific copy of your camera model. That means it is more than likely that the lens will not work as well on any other camera you put it on, including copies of your camera. As a result, if you put it on another body you will mostly have to reset the lens back to its factory defaults, and recalibrate it.

UPDATE: after talking with Tamron they felt there might be an issue with the lens. Since I also have the 150-600 G2 (and a nicely behaving 90mm macro) I am seriously thinking of sending the 18-400 as well as the 150-600 G2 away for servicing along with my camera body (Canon 7D M2). This is the only body I would use with those two lenses anyhow so...in for a penny, in for a pound. I think the entire kittenkaboodle is headed off to Long Island. Next big trip is end of March, nothing going on in my neck of the woods anyhow.

The OP's particular lens has 24 settings. While the FoCal certainly speeds things up, I would be very surprised that you could calibrate all 24 settings in 2 hours. That would be at a rate of one successful calibration every 5 minutes. The process of attaching the lens to the tap in, modifying a single value, taking the lens off the tap-in attaching to the camera and taking and reviewing the image would take much more than 5 minutes even if you got it right the first time. For a prime lens with three or four distances to test that would be doable. Of course using FoCal with a camera's micro adjustment system would be much faster since there are fewer settings.