THIS YouTube channel is produced by AutoDesk.
Although primarily designed as a series of monthly challenges, the solutions are very well produced, with explicit instructions and objectives given for every step. There is no need to join or to submit your own solution – just watch the official solutions.
Each bite-sized challenge consists of modelling a simple 3D object, the creation of which often requires the use of a particular, non-obvious, F360 technique or command.
I've found it to be one of the very best F360 teaching aids I've found.