Instead of Draftsight you can use Solid Edge Free2D:
https://www.plm.automation.siemens.com/plmapp/education/solid-edge/en_us/free-software/free-2d-cad
That is free professional 2D CAD plus free Viewer (Solid Edge, Parasolid, STEP, STL, JT, IGES, DWG, DXF).
For professional 3D cloud CAD my...