How to make a car select screen?

Cars amount: 40. They all ripped from the game, also they have own icon.

As it is a user interface need, you should look into widgets in ue4. In your case a combination of a scroll box with a uniform grid panel with buttons (one for each car) inside…

Can you tell or show me, how it looks in Blueprint Widget?

I strongly recommend you to watch tutorials on youtube or reading the Unreal documentation.
This widget is designed to be contained in another parent widget. If you only have to make this level of widgets, then you should place the scroll box inside a canvas panel (right-click on the scrollbox and wrap it with a canvas panel) and then resizing the scroll box to fit the space on screen that you want it to fill.

Thank you so much!

No problem!

Please mark it as answer.