Hey guys! Summer is in it's siesta!~ I need to do something to give back the FUN is SUMMER!

I wanna make sushi! I know, it's really easy DAW. Pero I wanna make some, and I know it doesn't fit out taste bud but what the heck, I want to ask some tips in making sushis and if you have recipes and warnings! GO!

1.) What is the best fish used in making sushi? Where can I buy it?
2.) Nori and the mat can be bought in SM. Pero The fish eggs. I can't find it there!
3.) What is the shelf life of the sushi?
4.) where to buy the sushi stuff?

THANKS!