Describing people

So, I am studying English from a website and now I have to write to practise how describing people. I wait for your corrections. Thank you. Ok, I start:

I am sure you have never met someone like my mum. The first thing you notice about Maria (my mum) is her curly black hair and her black eyes. When she is looking at you, you know perfectly how she feels herself.

Talking some about her face, she has a round face and chubby-cheeked, with some moles. She is 49 years old, so you can notice some wrinkels in her face. Despite of that, she has the most beautiful smile in the world.
She is so skinny and I always tell her to eat some more.

About her personality, she is always smiling and giving kisses to me. She tries to give me good advices and help me with my troubles. I need to say that she is the best cooker in the world, above all I love her croquettes.

Ok, that's a short description of my mum. I expect for your corrections. Thank you :)