Double-click

Most of my ex-AutoCAD user patners needed the option, to edit Families and Links easily, as they did before with a double-click on the spoted element. As I see other all around the World had the same issue, and the function is built into Revit. You can customize t under the Application menu (R button in he top-left corner) / Options:

The key setting window is here:

You can select an action to each double-clickable entity. This can be Do Nothing, Edit Type, or Edit Element, whitch means edit sketch at some cases including Floors and Stairs.

Place a Wall

Actually this is the most common step to start drafting. It is recommended to care about 3D, not only the plan layout. Check options one-by-one on the Options Bar after selecting the Wall tool from the Ribbon or type the "WA" keyboard shortcut.

User Interface during Wall command

1. Choose a placing method from the green backgrounded Ribbon section
2. Select the Wall Type you would like to build
3. Select the direction from the actual level (Height, Depth means up and down)
4. Select a Level or type in a real height or dept (depends on the third paragaph)
5. Location Line shows the theoretic line of the Wall structure, it can be: Wall Centerline, Core Centerline, Finish Face: Exterior, Finish Face Interior, Core Face: Exterior, Core Face: Interior (for effective modeling I suggest you, to use Core faces and centerline if possible)