Hi, Chevonne1974,
When you click on the Clip filter button in the toolbar at the upper right of your screen (the button that looks like three overlapping circles) and then click on the Clip Filter selection box where it says "None", you should see a large pop up a box on the left that displays all of the clip filters that are available. Are you doing that procedure but still getting no clip filter options?
If so, try deleting preferences. Open iMovie while holding down the Option and Command keys and select to delete preferences in the box that appears.Movie will open in a new library. Reopen your old library to get back to your projects. Deleting preferences is a safe procedure that will not cause data loss or disruption to your project. Not see if you get clip filter options.
-- Rich