Availability start times are on the hour, however, my start time is at 9:30am. How can I adjust it to 9:30am?

Currently you can only schedule your availability on the hour. We do have plans to add the feature to schedule it on the 1/2 hour basis in a future version of MyCue. In the mean time, you can go to your actual Schedule screen and block 9:00am-9:30am from it.