For new MacOS users switching from Windows, launching applications can be the first difference you'll notice. Although the tools on macOS are different, they are user-friendly and designed to simplify the process.
From the Dock
The dock is by far the easiest way to launch applications on MacOS. It is similar to the Windows taskbar, which contains an icon for each running app, except that the macOS Dock already comes with many standard apps. In addition, notifications will be displayed for each app, and apps that require your attention will be triggered.
You can click on one of these icons to start the app. When the app is running, a small white dot appears below the icon. You can click on any running app to automatically bring that app to the front.
The dock is designed so that you can customize it. You can drag the applications to change the order, drag an application from the dock to remove it, and drag one into the dock to pin it. If you remove an app from the dock, it will not be deleted, and you can launch it in a different way.
When an app is running, you can force it to remain in the dock Right-click (tap with two fingers on a touchpad) and drag the icon hover over "Options" and select "Keep in Dock".
The launchpad should be the third symbol in the dock, a gray icon symbol with a rocket ship.
This opens a UI that looks like you're using an iPad. All your apps are here, and you can start any one of them by clicking the icon.
The Launchpad has several pages, and you can move between them with three fingers. Use a device with a touchpad. As with iOS, you can retrieve all apps by clicking and holding and then moving the app. When you move two apps together, you can create a folder that stores multiple apps in a tile.
Launchpad with hot corners
Hot Corners is a feature in macOS that can activate the Launchpad by moving the mouse around the corner of the screen. You can enable it by opening the System Preferences app from the Dock and clicking Mission Control.
Click Hot Corners Button at the bottom of the window.
The Hot Corners settings should be displayed.You can click one of the drop-down menus and set Launchpad.
Try to move the mouse into this corner If you are in this menu, it is recommended that you set another corner for Mission Control where your desktops and application windows will be displayed It is recommended that you do not make any adjustments in the upper left corner as this may make it difficult to click on the Apple menu.
By Spotlight 
Spotlight is similar to Windows Search. You k You can search by name, even after applications.
You can launch Spotlight in two ways:
- Press Command and Space simultaneously, conveniently next to each other and directly under your left thumb.
- About the search icon in the right corner of the top menu bar.
Just enter the name of the app in the search window and press Enter when you see it in the results. The app should start or you will be directed to it if it is already running. You can also use Spotlight to search for many other things. it is a very useful part of macOS.
The Finder is the macOS version of Windows Explorer. You can browse all your files and launch applications directly. You can launch the Finder from the dock, or you can click on your desktop and press Command + N to open a new Finder window.
The Applications folder is not hidden and difficult to access when using "Programs" on Windows. You can simply click "Applications" in the sidebar to open the default Applications folder, which contains icons for each app on your system.
You can double-click on the icons shown here to open them or bring them to the current folder when it's open.
While most of your applications are in the Applications folder, MacOS applications are not installed as they are on Windows. MacOS apps are single files. There may be some applications in your Downloads folder. You can go to the download folder to start it. It's best to drag it with all the others to the Applications folder.