Well, the easy solution would be buy again windows and AutoCad.
How much did you pay for your Linux distribution or LibreCad? They both are mostly because developers have spent their free time do develop these foss products.
I have been using only linux for almost 30 years now, and said this many times, now again: I think it is great that there is at least one decent cad for linux, that is LibreCAD. Me and many other use it happily, it has certain limitations as almost any foss program because most of them suffer from absence of enough developers.
I think it would more fruitful for you to tell a little more accurate what is your problem, than repeating LibreCAD has been done without a plan.