Of course you can learn computers. Poor grades in high school does not mean you cannot learn computers.

1. The computer field is a relatively open field. What matters is your interest in computers and your attitude towards learning. While high school grades may influence your academic progress in some ways, they are not the deciding factor.

2. In the process of learning computers, you can start from the basics and gradually master programming languages, algorithms, data structures and other knowledge. You can gradually improve your skills through self-study, attending training classes or enrolling in relevant professional courses.

3. Actively participating in project practice, participating in programming competitions and other activities are also good ways to improve yourself. The important thing is to maintain the patience and persistence in learning, and believe in your own abilities, and you will be able to achieve good results in the computer field.

In short, it is very necessary to learn computers after graduating from high school. It can not only enhance our professional competitiveness, but also broaden our knowledge and help us better adapt to the development of modern society. Computer technology has become an essential skill, and learning computers will bring more opportunities and possibilities to our future.