Start simply by folding your piece of paper in half, hotdog style.
Fold the left and right top corners inwards, until their edges align with the center fold line.
Once you have folded both corners from Step 2, flip the whole piece of paper over, so that the flaps are now on the bottom, facing your folding surface.
Similarly to Step 2, fold the left and right top corners of the paper inwards, until their edges align with the center fold line
Fold the right side backwards, along the center line, towards the folding surface
Fold each wing of your plane over separately, aligning the top edge of each wing with the bottom edge of the airplane base
Now your paperplane is ready to fly!