The first is to learn to operate. Mainly to learn the basic application of operating system. The second is to learn applications. Here, "there is specialization in the technical field", which is divided into two levels: writing record and modification and system application (primary), and the realization skills of professional knowledge in the system (application level). The third is secondary development. Need to learn the basic theory of programming, programming practice, system construction and so on, and then more professional, to learn mathematical modeling and so on.

Inferring from the questions raised by the subject, what you describe as "learning computer" should mean "learning computer as a skill to make a living", otherwise, if you have the opportunity to study in an environment with strong learning opportunities and atmosphere such as colleges and universities, the questions raised should not be like this. I answer under the above assumptions.

On the first floor

I mainly study the application of operating system represented by windows, so as to be proficient in computer operation. Take the high school graduation level as an example, you can use it freely in about one month. This level will lay the foundation for the next two levels. If you have energy to study, you can reach a very advanced level here. If you want to learn the common functions of an operating system represented by windows, it will take longer.

At the second level

Primary: Mainly consider employment demand. Basic applications include office software, such as Microsoft Office series and wps series. If you have learned well, you can skillfully handle applications such as words, pictures, forms and databases, and you should be more than enough to apply for office positions.

Application level: Taking image processing as an example, we should learn professional image processing software, such as photoshop. At this time, it can be said that it is a "new trick, eating all over the sky." If you can study photoshop deeply, it is not a dream to earn 10 thousand yuan a month. Of course, you need professional writing skills to write the article well through the computer; If you want to do a good job in art design through photoshop, you need to learn professional knowledge in photography, art and design. You will find that the more you know, the more you feel you need to learn.

On the third floor

It can be said that learning is endless. Take the spreadsheet in office software as an example, it has many functions such as calculation and statistics, and has programming (secondary development) interface. It is not easy to really learn the basic functions of Excel. If you add secondary development, your development can be "unlimited".

Learning is expensive.

A thousand miles without accumulation. If you are young, have time, energy, interest, perseverance and self-motivated, you can get started at junior high school level. After getting started, you can collect information through the internet to study by yourself, and ask for guidance from time to time. You can learn while working if you have the ability to work.

Be good at exploring learning channels.

Now there are many professional numbers in the media, and the level is very high. Might as well learn from them with an open mind, give them more praise and ask them more. In the era of knowledge explosion, as long as you are willing to learn, there are stunts everywhere, and you only need to work hard. You can't learn it at school. People's learning is a lifetime thing. If you stop studying, you will die in a new era.