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 how to get help
Welcome to the forum! To get the Workspace Switcher, you can right-click in the panel, choose Add to Panel, then choose Workspace Switcher (it is near the bottom of the list). Mint does not have this in the default configuration, but it is easily added by those who may want it. Have fun!