Setting Schedules Easily

OK I’m sorry but the watering scheduler is very difficult to figure out. First of all there should be a simple system ON/OFF right up front in case I need to stop it instantly with my phone. Also where are there detailed instructions on the scheduling setup? Too complicated. I just have 3 zones that I want to start watering at 9pm for 10 minutes each 10 minutes apart! That’s all!
How difficult can it be?!!
Please help!