The best way to bevel vertices in a 3D model is to use your 3D software’s vertex bevel tool—select the vertices, then adjust width (how much to round the vertex) and segment count (how detailed the bevel is) for a smooth, controlled result.
Tools like Blender’s “Bevel Vertex” or Maya’s “Bevel” (in vertex mode) work well here, as they let you add edge definition without warping the model’s shape.
For beginners, start with 1-2 segments to keep the model lightweight, and use your software’s preview mode to test changes in real time before applying the bevel.