Good job! I'm a native English speakers and I could read it just fine. I just changed words around and fixed verb tenses for you to make it flow a little more. I also put it in paragraph form, but you can change that if you want. It sounds like you're writing a resume, so I made some of the words more "polished" and professional. Remember to always express how much you want the job, and how your skills could help the company. Good luck! 

I live in Cartago and I'm 25 years old. I'm single, and I studied telecommunications at the UCR.
I have completed two CCNA modules and one of IT Essentials. I worked seven year at Kimberly Clark as a machine operator, and I also had different occupations as a Provider Receiver. In that position, I have to receive all of the materials, tools, equipments, and everything that enters the factory. I also have to check them and sign the corresponding documents. I quit because I wanted to continue with my studies and it was a little difficult for my schedule. 

    Last year I saw this company's ad and I began to complete the requirements to work in this company. I do not have experience, but I really like and understand computers so I think it will be more interesting to work doing what I like. A couple of my accomplishments include learning English by myself, and earning a high school diploma.