Learning new software is always a challenge

Hello everyone. I'm an 82 year old retired mechanical engineer who taught himself AutoCAD about 35 years ago. I have been using AutoCAD 2002 up until very recently when the "unhandled exception" fatal error put me out of business. I was pleased to find LibreCAD, and I expect to use it quite a bit, but I will miss the 3-D capabilities of AutoCAD. Wish me luck as I stumble forward. :-)
Bill