Example project to connect the TTGO-LoRa32-V1.0 to TheThingsNetwork over OTAA
You can find the setup instructions for TTN V3 here: https://blog.squix.org/2021/07/ttgo-lora32-v1-0-with-ttn-v3-and-otaa.html
You can buy the device here: https://blog.squix.org/go/bg-ttgo-lora32-v1