I have a mother, father, and two younger sisters.

My parents are doctors and my sisters are pupilstudents.

My parents met at the medical university when they studedwhile studying in medical school.

My mother is from the province and my father from the city.

I'm not sure what you mean by province... Do you perhaps mean from the countryside?

My paraents and my younger sisters live atin an apartment in downtown. I live in my own apartment with my girlfriend in a neighboring area at own apartment.

One of my sisters study atis in high school and anthe other sister study atis in primary school.

OnThe of sisters, which study atne in high school, is going to become a doctor, like our parents.

Another sistThe other is going to become an engineer, or maybe an architect.

Sometimes, I have my famaily over to eat homemade food.

My girlfriend cook sos perfect, delicious and perfect meals.

It usually happens atduring the weekend.

I have a very wonderful family and girlfriend.

I am confident I can rely on my family orand girlfriend.

I have a mother, father, and two younger sisters.

You can also say: I have a mother, a father, and two younger sisters.

My parents are doctors and my sisters are pupilstudents.

Pupils is overly formal and you won't really see people using it even in written language. A more common way to say it would be: My sisters are in school.

My parents met at the medical university when they studied there.

You might say instead: My parents met at the medical university where they studied.
It's a little different, but it has the same general meaning and sounds more natural.

My mother is from provincthe countryside and my father is from the city.

I'm sorry, I'm not sure what you mean by province here. It can change depending on the region. If you mean a rural area that is not from the city, you might say countryside to sound more natural.

My paraents and my younger sisters live atin an apartment in downtown. I live with my girlfriend in a neighboring area at my own apartment.

One of my sisters studyies at high school, and anmy other sister studyies at primary school.

It will sound more natural to say: One of my sisters is in high school, and my other sister is in primary school.

One of my sisters, which study ato is in high school, is going to become a doctor like our parents.

Another sister is going to become an engineer, or maybe an architect.

It will sound more natural to say: My other sister is going to become an engineer or maybe an architect

Sometimes, I have my famaily over to eat homemade food.

My girlfriend's cooking is so delicious, and she makes perfect meals.

It usually happens aton the weekend.

I have a very wonderful family and girlfriend.

I'm confident I can rely on my family orand girlfriend.