engines needs 3 main things to run. Air , Fuel & Spark. SO check those Pulling a plug wire is a good test an easier way if your alone is to pull the wire and stick a phillips screwdriver in it and lay it close to one of the valve cover bolts and it should spark , you should be able to see it while cranking the car from inside. Also check the rotor inside the distributor ,sometimes the little screw falls off and the rotor spins freely. Fuel is a little more difficult Im asuming you probably dont have many tools so I'll give you some small hints. Make sure its quiet & turn the key to acc you should here the fuel pump come on and prime. I dont really know how mechanically incline you are so give us some more info as to what the car is doing. Is it cranking? Does it smell like gas ? What are the symptoms besides not starting?