Sometimes the guest officer can't analyze the priorities of things himself, and will only give priority to his own ideas. It is best to accomplish multiple tasks at the same time, and the greater the correlation, the better. For example, I write while studying Chinese language and literature, and I also study software engineering. Very busy. I am good at writing and Chinese language and literature, but I am far from learning programming.
Most people will choose the most convenient method instead of the most efficient one. The learning method should be simple enough for the public. For people with high enthusiasm, it should be sufficient.