Describing a person:

Hello Stephany!
Thanks for your email.
Of course I can tell you about my friend Mary.
She is 30 years old, and lives with her family, consisting of namely with her mother, stepfather, sister, her sister's husband and their two children. It's quite crowded in their house but they all are a very friendly to each other. (they all get on well with each other.)
Mary graduated from university last summer but unfortunately she doesn't work by in her chosen profession. Because of it that Mary is studying the English language, in order to change her job.
She is a hard-working and responsible person.
She likes reading, watching films, listening to music, travelling and so on. Mary is very kind and polite but a little bit shy, that's why it's hard for her to make friends. She is not a sociable and talkative person but at the same time Mary is conciliatory and deferential. I think it would be better for her to be more assertive and insistent person instead of being unassuming and meek. She should learn to give it to people straight and take them on. She must take the bull by the horns!
But I still think you will like her and get on with her.
I hope that my letter is useful for you. Let me know if you need more information about Mary.
Best wishes, Tanya.

Welcome to italki Tanya!

Very good!

I changed "namely" because you didn't list their names. e.g. "Olga, her mother, Ivan her stepfather, Elena her sister, her sister's husband Vladimir and their two children Marina and Oxsana."