I'm glad to know it has little connection to the books,
No resemblance, other than the name.
As for the other, yes - there are
threads, but nothing requiring having read any others. If anything, it's the reverse. Some other stories made more
sense afterwards. Such as Hearts in Atlantis, which was okay on its own but I was mind blown when I got to the relevant parts in DT. It becomes clear very early on that DT was the absolute center of everything King ever wrote. Every book, every character, and every challenge were all born from-and-after Roland of Gilead.
Anyway - I'm not one to recommend things, which might be evident here on ECF. I'll say what I like, but I never tell someone,
"You need to try this!"
Music and literature are no different for me. I know what I like, but that has no bearing on what someone else might like.
For me, DT was THE epic read of my life (and I've read a few, much like I've vaped "a few")

. I have it on my Kindle, and would LOVE to take that journey again someday (sure would be a whole lot easier than the hardcovers were!), but I haven't worked up the gumption. At least not yet. It's much more of a Jeep Wrangler ride than anything in a luxury car.
If I'm lucky, I will, because it was uniquely wonderful escape for me.