You boot into Ubuntu and see a desktop that looks nothing like Windows. No Start button, no taskbar at the bottom, just a purple wallpaper and a dock on the left side. This is GNOME, Ubuntu's desktop environment, and it works differently than Windows by design.
The dock shows your most-used applications. Click the grid icon at the bottom (called "Show Applications") to see everything installed. This is your application launcher. Type to search for programs instead of hunting through menus. Want to open Firefox? Click the grid and type "fire" and it appears instantly.
The activity overview changes everything
Press the Super key (Windows key on most keyboards) or click "Activities" in the top left corner. The screen transforms into the activity overview. This single view shows open windows, workspaces, and a search bar. It replaces Alt-Tab, the Start menu, and virtual desktop switching from Windows.
Open applications appear as thumbnails. Click one to switch to it. The workspace strip on the right shows virtual desktops. Drag windows between them or click to switch. The search bar at the top finds files, applications, and system settings. Type "network" to find WiFi settings, "terminal" to open the command line, or "calc" for the calculator.
This feels strange at first because Windows trains you to look down for the taskbar. Ubuntu puts everything in one place when you need it, then gets out of your way.
Finding your files
Click the filing cabinet icon in the dock to open Files (Ubuntu's equivalent to Windows Explorer). Your home folder contains familiar directories: Documents, Downloads, Pictures, Videos. But the structure differs from Windows.
Your user files live in /home/yourusername/. The root of the system is /, not C:\. Applications install to /usr/bin/ or /opt/, not Program Files. You rarely need to think about this. Files shows you what matters.
The left sidebar has quick access to common locations. "Other Locations" shows connected drives, network shares, and the full file system if you need it. Double-click to navigate, right-click for context menus. The basics work like Windows.
Essential settings you need now
Right-click the desktop and choose "Settings" or find it through the activity overview. The Settings app handles most configuration. Key sections:
WiFi connects you to networks. Privacy controls what data Ubuntu collects (much less than Windows). Power manages battery and sleep settings. Displays handles multiple monitors. Keyboard lets you customize shortcuts.
Under Details, find "About" to see your Ubuntu version and hardware specs. Software & Updates controls where Ubuntu downloads programs and updates.
The terminal lives here too
Press Ctrl+Alt+T to open Terminal. This black window with white text intimidates Windows users, but it becomes essential for AI development. Ubuntu's terminal gives you direct access to the system, faster than clicking through menus for many tasks.
You will use terminal commands to install Python packages, manage GPU drivers, and run AI models. For now, just know it exists and works better than Windows Command Prompt.
Top bar essentials
The black bar across the top shows the current application, system indicators, and your user menu. Click the network icon to manage connections, the sound icon to adjust volume, and the power icon to shut down or restart.
The user menu in the top right corner gives you account settings, system settings, and the lock/logout options. No hunting for a power button hidden in a Start menu.
Working with windows
Windows snap to screen edges when you drag them. Drag to the left half of the screen to snap left, right half to snap right, top to maximize. This works like Windows 10 and 11.
Press Alt+Tab to cycle through open applications. Press Alt+ (above Tab) to cycle through windows of the current application. The Super key opens the activity overview for a visual window switcher.
Right-click window title bars for maximize, minimize, and move options. The three window controls (minimize, maximize, close) appear on the left side of title bars, not the right like Windows.
Making it yours
Right-click the desktop and choose "Change Background" to pick new wallpaper. Settings > Appearance switches between light and dark themes. The Ubuntu Software app (purple shopping bag icon) installs new applications without hunting for setup files on websites.
Everything feels backward for the first week. Your muscle memory expects Windows behavior. Push through this adjustment period. Ubuntu's workflow becomes natural once you stop fighting it and learn its patterns instead.