u need to start from scratch.

does the engine turns over? does your dash lights come on?

if it does not, turn your headlights on and crank the engine, if light goes dim, then you are looking at the ignition system which could be electrical or the starter itself for starters.
but let me know.

if you got no headlights and dash lights at all, just check your battery terminals specially the ground side. Make sure the wire are not loose.