well, i havent really learned anywhere... read recipes online, and watched some tv shows a while back.
the trick is indeed getting the rice just right. i have tried using the branded as sushi rice and that worked very well, but honestly i think any short grain rice will do. you just have to recognise when to stop cooking and take it out. also, some recipes ask for sugar to be added afterwards on top of the rice and im sure that helps with the stikyness too. its really a change of gear for me, because normally i try my very best to get non sticky rice. and now this!
you can always start with sushi rice and jsut try your local brands after that.
so you need the rice vinegar as well, as it give a distinct flavor to things. and let the rice cool well before trying to roll it up.
you get the bamboo mat, and also nori if you so wish. i tried with and without nori. both are ok.
dont expect your first rolls to be perfect. i think the real trick is just practice.
my first run i tried smoked salmon and cucumber. when i tried compressing the roll some cucumber sliped out the ends

so try to cut the ingredients as long as the roll itself, if possible. or, just be careful and use some fingers to block the exit.
if not using nori jsut use plastic wrap to shape the roll. (dont forget to not let it get wrapped up in the roll as well
and yeah i also tried the nigiri (no nori just a simple rice cake) with raw salmon on top. quite delicious.
so far i think the secret to sushi is getting that rice jsut perfect.