Are these drills potentially good? or bad?

Being a career novice in golf, S&T is really like learning to walk again for me. Which is sometimes quite frustrating and even discouraging, because I see others here bringing over many years of practice with swings they have crafted that allows them some ability to function while still transitioning. For me there's nothing really I can bring over from my existing patchwork golf-swing. It was cobbled together years ago with a lot of guesswork, duct tape, and stiff controlling arms, achieving a shortened Chi-Chi Rodriguez-style motion where I could at least hit the ball straight and go a reasonable distance about 60-70% of the time on the course. But now learning S&T, there's nothing I can bring over to use in learning this system, and the arms and hands especially are getting in the way constantly, often without my even knowing how or when it happens. I feel rather unable to function at the moment.

That said, I seem to be hitting upon a couple of 'toddler-style' starter drills that, if nothing else, look to be helping me to learn some essentials of tilting and turning without the arms constantly getting in the way. You'll notice, I did not say extending, we'll get to that in a minute. The first involves using the 90% drill stance, and just repeating the swing motion back and forth, Hogan-style. This in order to focus on the hip-driven turn and feel the body pivoting around the spine with the arms becoming quiet:

One cool part of this drill is, I can see being able to work on it indoors during the winter, and maybe with some progress to boot.

The second drill is basically an extremely limited version of @Tom Saguto's all-important 2.8 drill (Best of all Time):

I'm focusing on this limit because, using Tom's words, this is as far back as I can take the club right now and reliably hit "8, 9, 10 balls taking a divot in front of it". With a little KFC to boot, as you can see starting in 3 or 4 of the shots above. It's maddeningly short, and not ready for the live course, but nonetheless crisp and reliable. I'm *hoping* it's something that can be built on. That maybe with a few more reps I might be able to take the swing back further, and then further and again, each time exposing something that's not right - like the spine extension that is so key to the full backswing. And without having to guess at 3, 4, 5 different problems occurring all at the same time. I'd be interested in others thoughts and comments, including if there's anything here that could be counterproductive towards reaching a full crisp contact KFC style swing eventually. Let me know, especially @Alan Studnicky , @timmos1 , @James Flood , @danny who have all commented in my posts previously.