Checkmating the Lone King
Understanding basic mating techniques is critical to winning games early on in one's chess career. A material advantage that carries on into the endgame will require the chess player to have a good understanding of mating with King and Queen or King and Rook.
It's great to practice these checkmating techniques, but it's not trivial to start learning the concepts. I've made a video that covers common examples and basic mating patterns. The most important thing to remember is the "box technique" where you limit the number of squares the opponent's king can move to. I hope you find it helpful!