If you have enjoyed creating 3D with Sketchup, you might want to check another cool 3D modeling software called Tinkercad. TinkerCad is a tool used from creating digital designs that are ready to be printed in physical objects. The good thing about Tinkercard is that it can run on your browsers. In addition, new users are guided through lessons moving from basics to more complex techniques.
The video below is a brief introduction and tutorial about Tinkercad.
A free account can be created to use TinkerCad. You can learn easily by viewing the tutorials.