For anyone that’s wondering,
I just wanted to update that I’ve been successfully able to perform OTA update for the STM32G030K8T6 MCU using the notecard.
I realized that it’s too tought to get access to the BOOT0 pin on the Nucleo board, so I designed and built a board that holds this MCU with just the bare essantials (I can send you the design if you’d like that).
After using an FTDI adapter & hooking the BOOT0 pin to 3.3V I was able to upload a basic firmware to it. Then, I hooked it up to the notecard, tracked that it’s negotiating with it and got it to interact with notehub I made an OTA binpack file per the guide instructions, made sure that the pins AUX_TX, AUX_RX, AUX_3, AUX_4 are connected to the MCU, I hit the Host firmware update and it worked like a charm 
Thanks for the guides, awesome product and the great webinar the Blues team hosted about it!
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