Then study an Indonesian/Malaysian martial art called Silat.I’m thinking 3’. For defense that’s the minimum to how close I want to be to someone. As far as use, something that can chop small trees, split kindling, handle like a working machete.
The techniques work very well with the blade that you're describing, it's less formal than kenjutsu and/or iaido, and qualified instructors are easier to find. The Phillipines have a blade culture that's influenced by Silat (and Arnis de mano, which is a stick in each hand, but also uses blade techniques).
The training is--by far--a million times more beneficial than just buying a blade.