Just drag to the trash can.
There is likely to be a Preferences file which you can also trash. However, leaving the prefs file while the app is missing will do nothing. Just waste 4K of disk space. The prefs file (if present) well be at Macintosh HD/System Folder/Preferences/<app name> prefs
A handful of applications will have an extension (driver) in the Extensions folder, and/or a Control Panel in the Control Panels folder. Usually anything that talks to custom hardware (like a webcam utility or video control software for a 3rd party video card) will have these items. Again, leaving them when the app is gone (or custom hardware is gone) will do nothing worse than waste a little memory & HD space. Such applications usually have an uninstall option in their installer, in case you really do want to remove every remaining piece of them. The option would be under the Custom install option in the installer.
You can move applications too, by just dragging. You DO NOT have to uninstall, then reinstall just to move an app.
And welcome to the Mac, where things usually are easier.