It wasn’t too hard
Just follow this link : https://www.raspberrypi.org/documentation/configuration/wireless/access-point.md
My only advice use a RP3 which has inbuilt wifi. I had all sorts of problems trying to use a RPi2 and USB/Wifi adapters. I went through 3 adapters without luck ! The newer operating system Strecth doesn’t seem to support some of the adapters.
All you need to remember is the sub is 192.168.2.2 and the topside is 192.168.2.1.
I set the bridge to a static ip of 192.168.2.3
I didn’t bother trying to broadcast 192.168.2.1 to the android phone. I set it manually on the phone.
I am using a Logech F710 Gamepad. I had to buy a OTG cable (small usb port on phone to female USB) to plug the wifi adapter in. Worked without having to do anything further.
Perhaps check that you gamepad will work because i did see on the internet that there are some issues with some of them.
It is currently running like a dream on my phone and will try and get hold of a tablet to make the screen a bit bigger.
Certainly a much simpler set up than trying to compile qgroudncontrol on the Rpi. Which did look like a nightmare when i attempted it.