Play with the 3D Pyramorphix simulator online. Press the shuffle button and try to figure out the solution and practice.
Use your keyboard: The letters turn each axis, similar to a 2x2 Rubik's cube, see notation. Use F1 to show them.
Letters rotate clockwise, shifted (uppercase) is inverse.
Use your mouse or swipe the screen on a touch device. Swipe the pieces to rotate a face or do it outside the cube to change its orientation.
Check out the menu, see the cube morphing between 3x3, 2x2, pyramorphix, and mirror cube.