Not to be a nit picker but with a neophyte trying to trouble shoot a possible electrical problem it should be clear.
Voltage is analogous to pressure and Amperage is analogous to volume. A bad connection has high resistance which would be analogous to a crimp in a hose which will restrict the volume that can flow through the hose. You can increase the volume (amperage) by increasing the pressure (voltage) or decreasing the restriction (resistance).
My vote for CLIFTT would be go back and verify the timing. If the engine is cranking over and there is a spark and there is fuel it should start or at least be making sounds like it wants to start.