Getting started with STM32F0x1/x2/x8 hardware development: https://www.st.com/content/ccc/resource/technical/document/application_note/c9/19/d7/b8/6b/0e/4c/d3/DM00051986.pdf/files/DM00051986.pdf/jcr:content/translations/en.DM00051986.pdf. Useful if you are designing your own board using STm32F0 microcontroller series

Getting started with STM32 step-by-step: https://www.st.com/content/st_com/en/support/learning/stm32-education/stm32-step-by-step.html. Useful for getting familiar with the STM32 ecosystem.