Getting started with Skydroid H12 pro

Hi forum
I recently bought Skydroid H12 pro and there is very less material available to work with it. Using those materials I reached till binding receiver with RC. However, binding is not permanent. Everyday I need to bind. Also the receiver is not fast enough to connect to RC when powered. It takes more than 10 Seconds to complete the connection with RC. This creates problem during calibration of ESC.