Ok so it has spark. Next up fuel and compression.
Fuel:
Do you have fuel in the tank?
When you turn the key to on (don't start it) do you hear the fuel pump run for 5 seconds then turn off? Should be a hum from under the passenger seat area.
If those are both good pull the fuel line from the injector. It is right on top of engine. With the key switched on you should get a good fuel flow from that.
If that's good reconnect it and remove the injector. Ground the spark plug to prevent inadvertent sparks. Hold a rag over the eng of the injector and have someone crank the motor over. You should get sprays out of the injector.
Compression:
Check the engine compression by installing a compression tester in the spark plug hole. Ground out the sparkplug again, and crank the motor over for a few seconds. If the motor is in good shape you should get 150+psi. Below 120 psi it likely won't run at all. If the compression is lowI would check the valve lash adjustment, if that's ok I would add little oil to the cylinder and check compression again to see if the rings might be the issue.
Tools:
You can make a spark plug grounding tool with a bolt, a ring terminal, some short wire, and an alligator clip. The bolt goes in the spark plug boot, ring terminal attaches the wire to the bolt, and alligator clip attaches the wire to a metal spot on the engine. This will prevent damage to the coil from having to jump a long gap, and prevent sparking when working with atomized fuel checking the injector.
You can buy a cheap compression tester from Amazon or harbor freight.
Let me know where you get to and we can further troubleshoot as you narrow down any issues.