How do I uninstall an app from my Mac?
For most apps, it's easy as navigating to your Applications folder in the Finder, then dragging the application to the Trash icon in your Dock. You can also right-click and select 'Move to Trash', or hit ⌘-delete.

I should also add, many apps store your settings and data in a different directory which doesn't get deleted simply by deleting the app in the Applications folder. This is both good and bad. If you ever reinstall the app, all your settings and data will still be in place. Keeping these extra files around doesn't really do macOS any harm. Although if you're concerned about removing EVERYTHING for a particular app, it can be tough to make sure you get everything. There are various utilities that make this a bit easier, one I've used in the past is AppZapper.

If you're curious, these files are usually in ~/Library/Application Support and ~/Library/Preferences.