I just don't see how anyone could not like that first book. There's some great stuff in there.I pretty much loathed The Gunslinger until just last year. I'd read it at least 4 times...and it finally clicked.
Having said that, if the total change in tone put you off, by all means skip it and go on to The Drawing of the Three. Everything you need to know about the first book is covered in either that or The Wasteland (sorry, muskrat , but it's true), and both of this e are FAR more readable.
There is a chance, though, that none of them will click with you. If you're not an epic fantasy guy, you could be bored or outright dislike them, and that's okay.
Lots of different flavored cookies in Mr. King's jar. This particular recipe might not be for you. But can't hurt to give it a chance to grow on you