Do you need training to learn STM32? It is estimated that it will not be less than 3k! Why waste money! Buy yourself a development board and follow the routine inside. Almost got started. It will be easier if you have studied 5 1 series single chip microcomputer. For example, I needed to do a new project with STM32 last year. I haven't studied in school before, so I can only buy a development board to read the information. After studying for a month, I am almost completely familiar with it and can be used in the project. So if you want to learn, teach yourself. There is a lot of information on the internet.