There are four personsople in my family.

Normally, you don't write "persons". It's one of those weird plurals. Although you *can* sometimes see persons, it's quite rare.

Naturally, it'sthey are my mother, father, and also it's my sister, and meI.

Kristina hasand I are the same age as I.

I'm not sure how Russian works, but I know that in French, age is something that you "have". In English, however, it is a state of being (you conjugate the verb to be).

We were born ion a man's holiday.

It's a Russian holiday - Defenders of the Fatherland Day.

I and Kristina arend I already now adults, and we live without our parents.

I live and work in another city and whilst Kristina lives in onthe same city withas our parents.

She has two daughters. and my mother helps her care for them.

AShe has two daughters and my mother helps her to care for them.

I'm just joining the sentences together, as they would fit in as a compound sentence.

Our family relationship is not as bad, but it's not great either.

I think, our relationship is just normal.

But I rarely ring tocall my parents and I don't talk much with Kristina.

I haven't really met anyone who says "ring". It is kind of outdated. As mentioned above, I just merged the two sentences.

AI rarely call my parents and I don't talk much with Kristina.

Only if II only see her when I will be at home'm visiting my parents.

I don't know why this'm not sure why it's like thatis.

Maybe It's have no interest for mein how she lives.

I try to go to my hometown at least twice a month.

There are four personsople in my family.

Naturally, it's my mother, father, and also it's my sister and meI.

What do you mean when you say, "Naturally"?

Kristina hasand I are the same age as I.

We were born ion a man's holiday.

It's a Russian holiday - Defenders of the Fatherland Day.

I and Kristina arend I already now adults and we live without our parents.

I live and work in another city and Kristina lives in onthe same city withas our parents.

You mentioned that Kristina doesn't live with your parents as well. So it's important to clarify that in this sentence. When you say, "Kristina lives in one city with our parents", it implies she's still living with them. But if you say, "Kristina lives in the same city as our parents", it says that she lives in that city that your parents also live, but not together under one roof.

AShe has two daughters and my mother helps her to care for them.

Never start a sentence with 'and'. You can connect the two sentences together instead.

Our family relationship is not as bad but not great.¶
Our family relationship is not as bad as most families but not great.¶
Our family relationship is not as bad as my neighbors but it's also not great.

When you use, "as bad", you have to specify, "as bad as what?". A comparison is needed.

I think, our relationship is just normal.

But I rarely ring tocall my parents.

A.... and I don't talk much with Kristina.

Join 'and' sentences.

OnlyI only talk to her if I see her when I will be at home visiting my parents's home.

I don't know why thisit's like thatis.

Maybe Iit's because it's no interest forto me how she lives.

I try to go to my hometown at least twice a month.

There are four personsople in my family.

Naturally, it's my mother, father, and also it's my sister and me.

Kristina has the same age as Ime.

We were born ion a man's holiday.

It's a Russian holiday - Defenders of the Fatherland Day.

I live and work in another city andwhile Kristina lives in onthe city with our parents.

She has two daughters and my mother helps her to care for them.

And my mother helps her to care for them.

Our family relationship is not as bad but not great.

I think, our relationship is just normal but I rarely ring my parents.

ring → call
works as well

But I rarely ring to my parents.

And II also don't talk much with Kristina.

Only if II only see her when I will beam at home visiting my parents.

I don't know why this thatit is like this.

Maybe Iit's because I have no interest for mein how she lives.

I try to go toback to my hometown at least twice a month.