It is well written.

My name is Jesus, and I  live in Mexico.
Im am 30 years old and I like exercising and sport.

It is written well?

My name is Jesus, and I am living in Mexico.
I'm have 30 years old. I like practice to exersice and play sports.

it is written well (Either "It is well written" or "Is it well written?")

My name is Jesus, and (I am living/I live) in Mexico. ("I am living" sounds more temporary, "I live" suggests a long period of time and perhaps that you are from Mexico.)

I'm have 30 years old. I like practice to exersice and play sports.