BLEND format is used in Blender only, so dxf to blend conversion describes import of CAD/3D model data to Blender and saving the edits as the default .blend files. It not really something you can do with another software.
You can find numerous guides and tutorials about Blender on the Internet, so if you struggle with DXF format import, it might be best to check these out.
Updated: October 9, 2023