If you're just getting started, before you buy a Hollander's kit you may want to take a look at this video:
Bookbinding - A Traditional Technique.For less than $20 it's a bargain, and covers what weeks in a bookbinding course does for a lot cheaper. You really don't need a kit once you've watched this video. I took notes and screenshots, organized my notes, and that kept me busy for months.
Also, the kits with pre-bound bookblocks don't help you learn to sew on tape or cords, which is a basic skill and makes for a stronger bound book. Kits are convenient, but limiting in their creativity in my experience. You don't get to choose your bookcloth or endpapers, for one thing. And you don't learn how to bind from the ground up.
That said, Hollanders has some of the most beautiful endpapers and other paper for binding I've seen, and their supplies are fantastic. Talas.com is pricey but good as well, and there are videos at papersource.com you may find interesting to teach you how to use PVA (bookbinding glue).
Kevin A. Smith has also written a series of books on binding arts/techniques I cannot do without as a hobbyist bookbinder. They're pricey, but excellent. Especially the non-adhesive binding. With your favorite paper, some leather suede, and some waxed linen thread you can do medieval bindings that are absolutely breathtaking. The bindings at renaissance-art.com employ Kevin's original non-adhesive bindings work.
But I'd start with the Bookbinding: A Traditional Technique DVD if I were you - or see if there are bookbinding classes in your area to attend. It's an obsessive hobby, and once you show people what you're doing, your family will want you to make books for them. "Can you do this sort of binding?"
And then you'll want to rebind your handwritten journals and go in search of a computer program to do that, and... it never ends. Heh.