So, i wanted to buy an psvita but i only have an ps3 and i dont have any other experiences other than nintendo but anyway what is a good tutorial and what do i need for it, do i need memory cards or smthing or can i use an sd card of any kind, can i have a (non offical) larger memory card that fits with like 64gb of data? what is a good place where i can buy one? if so wich model?