It sounds like you tried to learn and do too many things at once. Assuming you already have a loupe, first just practice framing and focusing - Do this with everything squared up and both standards parallel, as if it were a rigid camera. You will get the hang of it. After you are used to that, then experiment with the front or back tilts, but not both at the same time (yet). Then, reset everything to nominal and play with the front rise. Finally, get some Polaroid film and actually shoot things around the house, anything and everything. What I usually do is focus with the lens wide open so things really snap in, and then when I am happy with it, then I stop down and recheck the focus.