Creating enclosure and refinement zone for external aerodynamic study

Hello all,

I want to conduct external aerodynamic analysis of FSAE car for my project work. For this I am using Hypermesh as my meshing tool and Fluent as my solver. But I don't know how to create an enclosure and perform boolean operation for removing the car volume. Also, I want to include refinement zones around the car body. So how to do these things in hypermesh??