Basics for starters?

I played a lot of Zerg before.  I don't have any idea how to hotkey my stuff, and when I try I feel awkward trying to hit all the keys.

Used to go
Army - 1
Casters/Mutas - 2
Extra Stuff - 3
Queens - 4
Hatches - 5

Ummm.  I don't know what to do for an opening that's relatively safe to get to two bases.  I'm also used to expanding constantly and all that.  Spent some time watching the Pigbaby daily because that's a style I really like the look/feel of, but I have no idea how to get there, or start it.  Also in my test games I can spend my gas really well but I have a massive mineral bank.  I'm not sure what to spend money on.