This is a very simple and effective Half Guard Pass. It works well as a beginner and continues to be effective all the way through the ranks.

One of the great things about this pass is it does not require a lot of hip movement, balance or strength. As long as you understand how the leverage is applied by "caterpillaring" your body down your opponents legs (reference the video).

Make sure that when you make space for your hand under the legs you do not over commit yourself to pushing into