ScorpionGirl: Go back an ensure the “Front page displays” setting is still set to “Don’t show any posts or page”. If it isn’t, you forgot to save the setting. So, set it again and save the setting.
To create a slider, go to the media library and edit an image. The “Slider Options” control should appear at the bottom of the Edit Media page. If it does not show, the slider functionality failed to initialize for a yet unknown reason. But, assuming it does show, enable the image to be used in a slider (change “Add to a slider” from “NO” to “YES”), add a new slider name, select the slider name, and press the “Update” botton. Then, edit more images, adding them to the same slider by selecting the name. Don’t forget to update each time you finish changing settings on a page.
As indicated above, once you see the Slider Options control, slider functionality should be initialized properly. Now you can change the “Front page displays” settings back or to whatever else you prefer. But, don’t forget to select the slider under the custom “Front page” settings. And, don’t forget to save!