AutoCAD is a 3D program. Electrical and Mechanical Engineers that work in the AEC industry use AutoCAD. "Bridge Builders" aka structural engineers use AutoCAD.
You can get one from a local 7-11 or store in your area. Currently just in California and Texas but should be in most locations shortly. https://www.soylent.com/stores/
My mom was a court transcriptionist so that she could work from home and take care of my brother and I. Even though we hovered around the poverty line I had 24/7 computer access from the age of seven.