Welcome aboard, Bjorn & Michael.
Andy Quirt has excellent blades, Bjorn, so you picked a good starter - lots to study. Michael, whichever books you buy, please dig in so that you really understand the terms you'll run into (& there are many). When you can look at a sword & identify the terms you've read about, you'll know that you're ready to start searching for your first blade.
I also highly recommend NMB member Guido Schiller's http://www.nihontome.../Collecting.pdf to both of you.