Go to the categories in the backend and select the one you want to move. Click on the pencil there and this category will open at the end of all categories. In the right field next to the category is a number in a separate field, that is the number of the order. By changing this number, this category will be moved to the new place.
If you want to put the appetizers, for example, which now have the number 2 in the first place, then simply change this number to 1.