You can find screencasts and other content related to TinyML at youtube.com/user/petewarden
The latest versions of the examples are available at github.com/tensorflow/tflite-micro/tree/main/tensorflow/lite/micro/examples, with Colabs containing documentation on the end to end training and deployment process usually inside individual train folders, like:
There is an EdX course available based on this book, that you can take for free:
edx.org/professional-certificate/harvardx-tiny-machine-learning
The TinyML Summit organizes conferences and meetups around embedded machine learning.