Please follow these steps:
- Buy a ESP32 Board: https://www.ebay.de/itm/255283221996
- Download and install Arduino: https://www.arduino.cc/en/software
- Follow this video: https://www.youtube.com/watch?v=OfZUfXzYStM
More info:
- URL for the input box "Additional Boards Manager URLs": https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
- A detailed article: https://iotdesignpro.com/projects/getting-started-with-esp32-program-it-using-arduino-ide-blinking-led
- An advanced video tutorial: https://www.youtube.com/watch?v=xPlN_Tk3VLQ