You can use this free add on to convert your scene and prepare it for the Blender to Daz Studio plugin: https://github.com/specoolar/Blender-BakeLab2

Yes!!! To understand how a PBR workflow works, and become familiar with the principled BSDF shader, please have a look here: https://artisticrender.com/what-is-pbr-and-how-do-we-use-it-in-blender/ You should ensure that all materials are in PBR standard; if not, you should convert them first

Before installing a new version of the add-on, it is recommended to uninstall any previous versions to avoid conflicts. To uninstall: Open Blender and go to Edit > Preferences > Add-ons. Locate "BlenderToDazStudio" in the list of installed add-ons. Click Remove to uninstall the existing version. Install the Add-on Download the BlenderToDazStudio folder containing the add-on files. Open Blender and go to Edit > Preferences > Add-ons. Click Install, navigate to the BlenderToDazStudio folder, and select it. Enable the add-on by checking the box next to "BlenderToDazStudio". Restart Blender.