I want to automate incident creation from OMI event into ServiceNow.

Hi,

I created a flow in Oo that retrieves details of an event from OMi and create an incident in ServiceNow. I want to be able to execute the flow from OMI to automate incident creation and the same from ServiceNow to update the event in OMI. I've seen the third party tools out there but it isn't an option for me hence, I'm building  the integration myself and I need some help to automate.