Usually, making a 3D mesh model involves defining 3D vertices (points), connecting them into edges and faces (triangles/quadrilaterals), and refining the topology for detail or use.
You’d use software like Blender (free) or Maya—start with primitive shapes (cubes, spheres) and edit vertices/edges/faces (e.g., extrude, bevel). You can also import 3D scans to clean up into a usable mesh.
If you’re new, try simple objects (a cup, a box) in Blender—practice basic mesh edits first before adding complex details.
By following these steps, you’ll create a functional 3D mesh model tailored to your project.