how to remember the .........................

You need to study them one by one. Study only one each day, revise it the next day and only then start with the second kingdom. You should be clear with the various scientific terms used in the classification, which will make remembering easier. In case of plant divisions and animal phyla, the divisions and phyla proceed from the simpler to the complex organisms.

Another way would be to remember the differences between the various kingdoms and thus remember the characteristics.