How and where does wind start?

Wind is air in motion. It is produced by the uneven heating of the earth's surface by the sun. Since the earth's surface is made of various land and water formations, it absorbs the sun's radiation unevenly. Two factors are necessary to specify wind: speed and direction.

And the wind start concept:Two concepts are central to understanding what causes wind: air and air pressure. Air comprises molecules of nitrogen (about 78 percent by volume), oxygen (about 21 percent by volume), water vapor (between 1 and 4 percent by volume near the surface of the earth) and other trace elements.

Hot air rises, creating a partial vacuum. Air flows in to fill the vacuum. That is wind. This explains why Washington, DC, is so breezy when Congress is in session.

It starts I believe from differences between hot and cold air

Tides are related to the moon so wind probably is too.