When I turn the key to crank the engine it keeps cranking?

Hello,

Generally speaking, you will need spark and fuel in order for the engine to start.
So, you will need to start by checking for spark and fuel.
When you turn the key to the on position, are you able to hear the fuel pump prime for a few seconds?
One way to tell if it is a fuel issue is to spray staring fluid into the intake and try to start. If the engine starts for a few seconds, then stops it will tell you that the engine is not getting fuel.

Take a look at this guide:

https://www.2carpros.com/articles/car-not-running-advanced

Let me know what you find or if you have any questions.
Thank you.

Right, if the engine is cranking but not starting, that means you are not getting spark or fuel. Have you got a chance to check the guide to further diagnose?