From AutoCAD to LibreCAD

Hi all!
Many years ago I worked for a little time with AutoCAD 10/12 and developed a little AutoLISP program to design (calculate and draw) microwave components.
Now I migrate all my media (graphic and audio) programs to Ubuntu, so I installed LibreCAD and started (slowly...) to learn it.
As soon as I know "howto" I'll try to write some plugin to parametrize the draw of elementary parts.
Bye!