I don't think FreeCAD on your resume will convince a hiring manager that you are skilled in any other CAD system. FreeCAD has a long way to go before it can go toe to toe with Solidworks as professional CAD system. In the same breath, FreeCAD is probably the best hope for opensource CAD.
I'll echo the comments about taking a community college class in the system you want. You should consider what industry you are trying to break into before you choose which CAD classes to take. AutoCAD rules the architecture world. Solidworks is big in machine design. CATIA is big in aircraft and large companies. Do you have a specific employer in mind? Learn their CAD system.
Regards,
Jason