About me.

My name is Jose. Hello to this community.  First of all my I apologize for my poor level of English but I hope to improve it step by step with your help. I`m a doctor in cardiology and live in Huelva in a nice house on the beach.
I`m divorced, and I have 3 children. I really love english.

Capitals:

English is a proper noun--languages, countries, people's names, specific organizations, etc. are all capitalized.  Cardiology is a subject so it is not capitalized.  If you made a reference to the Huelva Cardiology Department that would all be capitalized because it is all part of a name.

Commas example:

I have a dog and a cat. (2 parts, no comma)

I have a dog, a cat and a horse. (3 parts, one comma)

I have a dog, a cat, a horse and a cow.  (4 parts, two commas)

I have a dog, a cat, a horse, and a cow. (The use of the extra comma here is called the "serial comma" or "Oxford comma" and is also an option, but generally not used with only 2 parts like the first example)

About me.

My name is Jose . Hello to this community .First of all my I apologize (or my apologies) for my poor level of English but I hope to improve step by step with your help. I`m a doctor in cardiology and live in Huelva in a nice house on the beach.
I`m divorced with 3 children. I really love English.

Welcome to italki Jose. You made a great start!

One other comment about punctuation: There is never a space before a comma or a period.

About me.

My name is Jose. Hello to this comunity. First of all, my apologies for my poor level of english but I hope to improve step by step with your help. Im a doctor in Cardiology and live in Huelva in a nice house on the beach.

I`m divorced, and I have 3 children . I really love english .