Everyone above has given you great advice, especially that both Simon & Waz have built EX's.

Those gaps you've shown with the clamps looks very acceptable in my book.

I think your most critical first decision is how you want to finish it, natural or solid colour.
If considering staining, the neck pocket join could finish up well enough, but that top/front is worrying for me. With a solid colour, you could get the neck join absolutely seamless as well as not having to worry about the "butcher's block" look on the front.

Of course the final decision yours to make.