Of course! You can add custom restart times in the control panel so you could set multiple restarts to all occur throughout the day. Do note that all times are measured in Pacific Time within the tool.
Of course! You can delete the world folder using FTP, then run an update to generate a new world. As for adding yourself as OP, this can be done either through MCRCON or using FTP. If you have any further questions please submit a ticket and we will help you out!