Welcome to PCBdesign wiki!
I'm sharing here my PCB design projects. The first one is a STM32F103C8T6 Bluepill clone. Everything the same but with THT components. More versions are comming soon... My plane is to design a similar board with an additional ESP32 controller. After that I will try to design boards with more robust controllers with rich I/O sets. I would like to use these boards for vision and machine learning projects with wifi and remote programming support. Maybe later I'll build up a CI/CD pipeline.
So here is my Bluepill clone: https://github.com/czagaadam/PCBdesign/tree/main/STM32_test_board