On places like YouTube, there are many short videos uploaded with fragmentary functions.

Also, there were many videos that introduced functions that were not actually used very often, so it was difficult to study only through those.

The time it takes to search without knowing if there is a function suitable for that situation is stressful.

In the midst of this, while I needed detailed videos on the functions commonly used by people in the field, I came across a basic package lecture on cgbump.

It was a very satisfying lecture for me.

In addition to detailed explanations of commonly used functions, the lecture was good because I was able to re-learn the functions I had learned by using examples from time to time.

The speed of explanation was appropriate, and I liked it better because I could feel that a lot of effort was put into consideration for the learners.

If you read all the information here and start working, I think your efficiency will increase a lot. I recommend it.