So i just got my first Vita

And the previous owner homebrewed it. Seems to work great overall, theres a bunch of games on there, theres adrenaline, and so on... but i have no idea how the whole thing is set up.

Im very familiar with 3DS Homebrew, have done some on a PSP, have no idea about the Vita though.

Is there something like a full Guide?

Does the Vita have something like the nintendo H-shop or Universal updater?

Any help is appreciated.