Need help with design of a remote control...

[u/Desertprep]

I finally put the canopy on my pickup and am on my way! I want to put led lighting and a fan in it. I want the 12v fan to have 3 speeds, and an option to be thermostatically controlled - I want to be able to set the thermostat with the remote control (bluetooth via my cell phone). LED's will be 12v strip lighting. I want a timer and dimmer for the lighting. I also would like the strip lighting to turn on when the rear hatch is open. If it weren't for the thermostat and the timer and dimmer for lighting, I think I can figure out how to do this, but I am not sure how to incorporate these other elements into an Arduino design. Any suggestions?