How to program TTGO TBEAM modules

I would like to ask you about how to program the new boards. I have read hundreds of conversations in Github and also in this forum. Apparently, new TTGO V1.1 seems to be preinstalled to work with Meshtastic, but being honest… I dont know how to check if the mines are programmed or not.

Could you tell me the parameters or functions which should be re-programmed before using it with my meshtastic app? My purpose is to create a network between devices to share the GPS positionning. I think that Smart Position Broadcast is an amazing idea. Indeed, battery should last longer… isnt it???

I just walk through the programming process.
Meshtastic has complete document about setting up the build env:

Flashing ESP32 devices firmware

You will see meshtastic logo on the OLED screen when you power the device up, if the device is programmed.