re: "Hi. I have a hourly contract with a client. I teach him Russian. We had a lesson on Friday. How I can get money? Help me please..."
You receive your money AUTOMATICALLY.
When the client decided to hire you, he clicked a green "Hire" button in his client-side interface.
This sent an official Upwork hire offer to you. You clicked the "Accept" button.
Then you checked here:
Upwork -> My Jobs -> My Jobs
...and you confirmed that you were officially hired, because the contract/job showed up on that page.
When you were teaching the client Russian, you were tracking time using the desktop Upwork application - the "Time Tracker." OR, as soon as you finished a teaching session, you MANUALLY LOGGED the time in your work diary.
BECAUSE YOU DID ALL THESE THINGS, you will be paid automatically. The client does not need to do anything else. And you do not need to do anything else.