Can anyone help me out with a 360 panorama?? I use the 'Litchi' app to take pictures. When it comes to stitching though what site or program is best?? And after the stitching is complete how do you post it?

Try Drone Pan.

Try MicroSoft Image Composit Editor "ICE", it is free (for Windows) and works great.  For the image capture, I do mine manually with a high overlap ~60-75% and just yaw the craft and tilt the camera,  Not really challenging flight , but makes cool output