We ask you to please thoroughly read the VEX Skyrise Game Manual and to please review the Q&A Usage Guidelines before posting in this forum. Specifically, please quote the rule or definition that your question is referring to.
As you can see from the above quoted manual section, the Autonomous Period is 15 seconds long.
As you can see from the above quoted manual section, you do get your Preload prior to the Match.
There is no restriction on which direction your Robot can face.
All forms of Scoring, including pushing Cubes into the Floor Goal, are counted during the Autonomous Period.