What would cause my engine not to start up?

We need to start with finding out what we have and what we don't in order to start the vehicle. You need spark, fuel, and compression. Here is a guide that helps with this:

https://youtu.be/dCjmRL3p4Cs

We need to start with checking fuel pressure. Here is a guide for that:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Then we need to find out if there is spark. We do that by pulling a plug and holding it against the engine and crank the engine to see if it sparks.

Lastly we need to check compression. Here is a guide for that:

https://www.2carpros.com/articles/how-to-test-engine-compression

Once we know the results of these items we will know what direction to go. Clearly we could guess at what is next but we need to find out where we stand with what we have and do not have and then we can determine next steps. Thanks