The most likely issue here is the starter solenoid is failing. When you are jacking the vehicle up, it is unlikely doing anything as I suspect if you just turned the key to the start position a number of times it would bump the solenoid over until it found a spot that was not bare.
Here are a couple guides that will help with this:
https://www.2carpros.com/articles/starter-not-working-repair
https://www.2carpros.com/articles/how-to-replace-a-starter-motor
However, the way to confirm this is to check both wires at the starter when this is acting up for 12 volts.
https://www.2carpros.com/articles/how-to-check-wiring
Basically if you have 12 volts at the starter on both wires shown below when cranking the engine then the starter is the issue.
Please run through this and let us know if you have other questions. Thanks
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Wednesday, September 15th, 2021 AT 8:41 PM