Add me in your skype (javisep1). I want to improve my English. Thank you.

My native language is Spanish. I'm from Chile and I live in Argentina. I want to improve my English and want to practice with people who speak English. and I want to help improve their Spanish. My profession is technical (a technician?) in electronics and computation. and We talk about culture, customs, and what comes to mind. I consider myself kind and respectful of others and thank you all.

Very good. Again, make sure you keep one idea separate in one sentence. It's also okay to leave out a verb if it applies to all the clauses (ideas) of a sentence. (I want to improve my English and to practice with people) We understand that you "want" to do both of those things. That way you don't have to say the verb over and over again. Then, the sentence will be concise and not go on forever (I want to do this and I want to do that and I want...) Very well done :)

Add me in your skype (javisep1), I want to improve my English, thank you.

My native language is Spanish, I'm from Chile and I live in Argentina. I want to improve my English, and I want to practice with people who speak English and want to improve their Spanish. My profession is technical in electronics and computacion. We talk about culture, customs and what comes to mind, I consider myself kind and respectful of others and I thank you all.

Great job, but I think that you should break this into a few sentences. It's one long sentence.

We use I quite a bit before verbs although it's fine without it sometimes.

Add me in your skype (javisep1), I want to improve my English, thank you.

My native language is Spanish, I'm from Chile and I live in Argentina, I want to improve my English, and want to practice with people who speak English and want to improve their Spanish, my profession is technical in electronics and computer, and we talk about culture, customs and what comes to mind, I consider myself kind and respectful of others and thank you all.