Turn steering wheel fully to the right (optional).
Get down 'n dirty in-front of the front right wheel.
Locate AT Gear Position Sensor (just aft of the Transmission's Fluid filler plug.
Loosen/slacken its two (10mm head) mounting bolts (just slightly to get fwd/backwards movement), while someone is holding the key in the "start" position, rock the sucker fwd/back and see if you get it to crank.
If so, find the best position (mid), re-tighten.
Keep clear of moving parts, fan belts, etc.
If not, follow starter's electrical schematic...
If you want to quick-check just the starter:
On the starter itself,
Jump-wire the starter's main (Heavy) wire to the male spade connector on the starter solenoid (small wire to the bottom, remove female spade connector/wire) and it should crank.
If the key (ignition "on", it will start - remove immediately.