How to do Indoor Map navigation?

I am using beacons to show an indoor path using Unity Augmented Reality feature.I have bought a plugin from asset store.From beacons I am getting the RSSI(strength).I am using only a single beacon.I could pop up a message or model when inside the range.

1)How to show the direction from device to where the beacon is situated?Should I use triangulation method(Deep knowledge in maths required?)?How to achieve it?

2)Is there any alternate method other than using beacons.I think it is the future without using beacons. Blippar is already working on it(2019).

imo, beacons are trash.

Yes…now without using beacons is the way forward.