Most users will be directed to the schedule page upon login. If you are not, you can get there via the Schedule menu as seen in the image below. (Note: Your default page can be specified in your user preferences.)
To make a schedule:
If you are using a calendar view, which is the recommended view, you can click on the schedule grid on the row of the resource you are interested in and approximately on the date and time that you want. This will bring up the Make Schedule screen with the selected resource and date/time populated. (As an alternative, you can also click on the link labeled 'Make a New Schedule' to bring up the Make Schedule screen.)
For example, clicking on the red outlined grid section (seen above) would populate the Make Schedule screen to show 3344B for 10/30/14 at 2pm. You can still change the information if needed, and you may need to enter a destination. If you would like to schedule an instructor for the same period of time, click the 'Show Instructor Line'. When you are done, click Make Schedule to complete.