For one - typewritten Japanese is a bit different than hand written. You should NOT be trying to emulate typed Japanese for handwritten. You`re setting yourself up for all kinds of problems. Learn regular hand written, then tailor it to your own handwriting style after you`ve mastered it.
Practice with something like
here.
And be aware that normal handwritten Japanese ends up looking quite different from any font out there. Unless you use something
like this.