this video covers:-
-create model on autocad
-save model in the format that can be imported to ETABS/SAP2000,
-import autocad to ETABS
-use tools line extrude point to frame, frame to shell
define materials and section proerty to etabs.
by the end you will be able to import autocad model to etabs and doing similar way you can import other features like Grid, 3d model etc from Autocad to ETABS/SAP2000