I prototyped it so far with a raspberry pi and a USB RFID reader but my goal is to switch to something like this. I haven’t done anything with ESP32 before and it will be my first time soldering ...

Yes, it’s an OBD-II dongle that you can build using an ESP32 WROVER module. It’s designed to read a car’s CAN bus communications and display them on a self-hosted web page, accessible over WiFi.