You can run simple clash detection inside Plant 3D using the Interference Check tool. Use this before exporting to Navisworks.
To build proficiency in AutoCAD Plant 3D using PDF tutorials: Autocad Plant 3d Tutorial Pdf
The 3D model is only as good as the P&ID. Your PDF should teach: You can run simple clash detection inside Plant
A common confusion. The Plant 3D specific palette (gear icon) manages specs and lines. The standard AutoCAD palette manages blocks. Keep them separate. and searchable document.
However, the software comes with a steep learning curve. For many engineers and designers, searching for a reliable is the first step toward proficiency. Why a PDF? Because learning on-site or referencing commands while modeling requires a portable, offline, and searchable document.