Well, it's not
easy, but it's certainly do-able. My first guitar (scratch-built, not a kit) came out very well. I did have the great advantage of doing it with a professional luthier, who told me what to do and I did it, but I did do all the work.
A kit will simplify your life somewhat. You may want to look at John's kits (Blues Creek Guitars). With one of his kits, you get John. I suppose with this forum you get John anyway, but I think if you're building one of his kits he is determined that you Will Not Fail.
And you do have this forum. No matter what dumb thing you do, one of us has done it too, only maybe worse, and we're eager to answer any and all questions as best we can.
The tools you need... That question keeps coming up over and over again. We ought to set up a "sticky" note that discusses what you need, that we can refer people to.
The big-ticket items are the body mold and radius dishes. You can manage without the radius dishes, but it's a lot harder. There is also the question of how to cut the binding and purflng channels. The ultimate solution may he the Fleishman binding machine John sells, but that's a lot of money if you don't plan on building several guitars. The cheap solution is a gramil, which takes time but it works. (n.b. you may as well find out now: hardly anybody builds just one guitar.)
Otherwise, you mostly don't need specialized tools. A few top-quality wicked sharp chisels and a way to sharpen them, a lot of clamps, a small block plane, a small square, small saw. There are any number of tools, specialized and otherwise, that make the job easier, but mostly you don't absolutely need them. If the kit has pre-bent sides and a slotted/radiused fretboard, that eliminates some specialty tools you would otherwise need.
I'm sure I have overlooked things, but that may give you an idea. There is a book available that gives step-by-step instructions for building a guitar That might help you get a better handle on the whole process. (There are probably many such books, in fact.)\
And do look at the wealth of information on John's website, maybe starting here:
http://www.bluescreekguitars.com/?d=tut ... tten&tId=2