I am Mina Wadie Fathi. I am a communications engineer.

I am learning English because I want to work in the UAE. 
My native language is Arabic & I grew up in Giza, Egypt. 
I am interested in upgrading my English level.
I work out at the gym.

You had "cuz" and "wanna" -- if you are writing in chat, this is okay, as long as you know they're slang! English speakers say both when they're speaking or typing informally.

In Arabic you don't need an article when introducing your job, but English always requires this. "I am a teacher. I am an engineer."

Usually, you don't need an article before a country name ("I want to work in Switzerland" or "I want to work in England"). But some countries do require this, especially if they begin with "United" ("I want to work in the United States," "I want to work in the United Kingdom," "I want to work in the UAE").