Here are some SketchUp Resources that may be useful to you!
If you are new to Sketchup Pro, this is the official site for SketchUp .
Sketchup artist has provided a whole list of blogs that people can use for learning software and visualization techniques.
Ronen Bekerman’s blog is really good for architecture visualization This link provides tips to increase productivity in SketchUp.
For anyone who is looking to learn Vray for Sketchup, here is the official site for Vray. Vray for SketchUp from chaos group.
Hopefully, these resources will be useful to you! Enjoy!