Training developers, in fact, the most important thing is not to tell them the theoretical knowledge related to CMMI. Only in this way will everyone feel too bored, and even say that it is better to read the information in private (probably not in private). The key is to tell them what benefits it will bring to employees and the company to use the relevant tools, or to use these processes to write documents according to the relevant templates, so that they can really use them, not just the requirements of the company (in that way). I also hope that you can talk about your own views on the relevant implementation methods.