There are no such things as "stupid" questions. However if you think your question is a bit stupid, then this is the right place for you to post it. Please stick to easy to-the-point questions that you feel people can answer fast. For long and complicated questions prefer the other forums within the support section. Before you post please read this
In the Main Edition you add Workspace switcher to the panel.
Then right click and click preferences to get to how many to have.
In the KDE CE
Right Click on the panel and click and Add Applet.
Now add the Desktop and Preview Pager.
Now you should see the Desktops on the panel.
To change the Desktops know just move the mouse over the applet and use the scroll on you mouse to switch them.
Which version do you plan on using?