All the glue joint bits I know of have to be used with a fence and yo try to pass something as long as flooring 90 degrees along a fence is going to be very hard to do. I would suggest using either a shiplap type joint or going tongue and groove with a bearing guided set. Either of those ways could be done handheld.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.