If you're interested in trying out AutoCAD Civil 3D 2018, you can get started with a free download. Here's a step-by-step guide:
A: Unofficially, yes. But Autodesk did not test Civil 3D 2018 on Windows 11. You may encounter display glitches or installer errors. AutoCAD Civil 3D 2018 Free Download
Avoid any website offering “AutoCAD Civil 3D 2018 free download full version with crack.” Instead, go to the Autodesk Education Community or purchase a legal subscription. Your career and data are worth more than a free download. If you're interested in trying out AutoCAD Civil
If you manage to secure a legal copy, ensure your hardware meets the official 2018 system requirements : Free CAD Software for Students & Teachers, and Personal Use and Personal Use