You can go through the modeling guide to gain a basic understanding of the Interior Modeling funciotn. Follow the guided tutorial and use the basic functions to draw shapes, extrude to form a solid, and do detailed modeling with fillet, so as to quickly understand and get started with interior modeling. Click on the modeling guide in the Help menu in the upper right corner anytime if you want a recap, and complete the operations one by one according to the steps and guidance on the screen.
