Here's a quick drawing. As far as transitions joints go there's 2 ways.
1- click flooring has there own transitions pieces, they come in a package that contains a u-track screws and the transitions piece. The transition u-track is screwed to the floor about a 1/4" away from the flooring and then the transition piece is snapped in. Becarefull now make sure that the u track is far enough away from the flooring that it does not get hung up on the flooring and when you screw that u-track in make sure it is nice and staight. I always install these after the baseboard moulding is in so if the transition gets damaged you can remove it without disrupting the base trim.
2- finishing stores have real wood transitiond pieces that are glued or nailed or even screwed with little caps but is a little more work involved.