About my goal

Hi! Currently I am working for an American company so and I have to communicate with my foreign partners every day in English. But for now My English leaves much to be desired., so if you have time to help me improve my English, I will would appreciate it. In return I will helpl you with your Russian. Thank you.

--Notes--

1. American company

American is a proper adjective derived from the proper noun America, so it must be capitalized. 

2. ...and I have to communicate

It is better to use the conjunction and because the second clause does not directly follow from the first. You could eliminate the conjunction and write two simple sentences and it would mean the same thing: I am working for an American company. I have to communicate with my foreign partners every day.

3. improve my English

It is more idiomatic and polite to ask someone to help me improve my X. When you say improve my X, it sounds abrupt. 

4. I will appreciate it.

It is better to say I would appreciate it when making a request for help. There is no obligation for someone to help you, so it sounds more polite to use the conditional form of will, which is would.

The First Snow

I am from Belarus. Today is October 26th. and today we have the first snow of the season. Outside it is a very cold (we have -3 degrees). all people Everyone is drinking hot chocolate...

--- Notes ---

1. I from Belarus.

In the present tense, use the verb to be. This is one of the more difficult things to learn as a Russian speaker, so it's worth extra attention. I am, You are, He/She/It is, They are.

2. 26th October

We normally write the month first, then the number. Alternatively, you could write 26th of October.

3. first snow

We use the definite article the when we say first snow because it is a special, singular event that happens once per season. It is not just a/any first snow, but THE first snow.

4.outside is a very cold

Outside is a preposition in this phrase (where is it cold? outside). The subject of the sentence is it because you are talking about the temperature. We don't use a/the when describing conditions like hot, cold, warm, cool, and so on. Examples: It is cold outside. Outside it is very cold. It is very hot inside. I am very cold outside.

5. -3 degrees

In the United States, we measure temperature in Fahrenheit, unlike the rest of the world, so if your audience is international, you can avoid any confusion by saying -3 degrees Celsius or -3 degrees Fahrenheit. Fahrenheit and Celsius must be capitalized because they are proper nouns.

6. all people

You can say people are drinking hot chocolate, or if you want to emphasize that every single person is drinking hot chocolate, then it would be better to say that everyone is drinking hot chocolate. Also, since it is the present tense, don't forget to use the verb to be with the verb in the present progressive tense because the action is in progress right now (I am drinking, he/she/it/everyone is drinking, they/people are drinking). Everyone is a singular indefinite pronoun while people is a plural noun.