Ansys Employee
If you are beginner: I recommend that you start first of all doing a couple of tutorials and perhaps attend one of the self paced trainings on the Ansys Learning Hub or check any other resources you might have access to.
To set the output parameter correct: Under Report Definition create a surface integral->Area-Average of abolsute pressure at inlet and tick "Create Output Parameter".
So now correct the operating pressure in Fluent, in the Workbench under View tick "Properties". Now if you click on Parameter set, tell WB to initiate every DP from current. Do not forget in Fluent to enable convergence by residual again (please enable local scaling under Scale), under Initialization please select "Hybrid" and let it go.