Tindrrel (what's your real name by the way ?) up to you pre-drilling before finishing the axe is good practice, in case you damage the surface in any way.
I'd drill your neck in place, put your B & G strings on and align the bridge. You will need to clamp the bridge as the string tension will want to pull it forward.
As DB previously said use 2 clamps and a piece of wood across the body to hold the bridge in place and drill the holes once the alignment looks good