Heltec V3 - where to start

Hello everyone!

I know very little about LoRa … I am more hardware, chatgpt will help me code my Heltec v3.2.
So, I bought 3 units I see they came with some firmware … but I could put they to talk with other yet.
I just wat to make an off line network (private).
After I would like to use a laptop to send messages to specific Heltec v3 (give volts, switch on/off a rele etc…) I also bought 2 LoRa wifi BLE GNSS, in this one I would like to get info about UTC and position real-time , time to time …
Once this things work I will buy mane more.
Could some one give me the first steps ?

have a look at RadioLib
for point to point using a Heltec V3 transmitting to a Heltec V2 using the Arduino IDE try

Heltec LoRa V2 SX1276 File>Examples>RadioLib>SX127X/SX127x_Receive_Interrupt

Heltec LoRa V3 SX1262 transmit test File>Examples>RadioLib>SX126x>SX126x_Transmit_Interrupt

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