I am working on a project where I need to switch 12 V, 10 A high side using a P-channel MOSFET. I understand how to construct a P-channel MOSFET 3.3 V logic-level driver using an NPN transistor which controls the MOSFET, but I'm having difficulty figuring out how to select components that will work. Are there tools like LTpowerCAD that can be used for this?

I vaguely understand the different properties of transistors and MOSFETs that are important, but I think I'm most confused on what properties I need to look at for the transistor and MOSFET to work together.