Creating Shapes with wood.

[ihasmario]

Hi,

I have question regarding a basic woodworking skill. I've attached a picture that shows what I am talking about.

I am looking to build a booster that will act as a cradle for a neck heel where I can glue the neck heel in on all sides except the top (like a neck pocket for an electric guitar). For the moment, I am testing with pine planks. The planks are outlined - the whiter blue square is a "back" to increase the strength of the join.

1) What is the best way to create the sloping triangle shapes on the outside two planks without power tools?
2) What is the best way to create a smooth, even curve on the bottom half without expensive power tools?

If a tool would help a lot - I have access to a jigsaw and a drill

Thank you