Then you could find a tutorial which works with something like an airfoil shape, or a Ahmad bluff body. Then change the body to be your body. You could use llm to get ideas on how to achieve these steps. The technical bits would be to pick the right tutorial as a template. Here you will need to understand the typical velocity of your interest, and what kind of system (boundary conditions, mesh, fvSchemes, and solver) suit your situation -requirements change with velocity (e.g. incompressible flow can become invalid with high Ma, turbulence may need to be accounted for, wall boundary layer may need to be carefully discretized)