The path is not difficult, but you should take some time and make sure you wear sturdy shoes. Since the low oxygen content can lead to poor concentration, the narrow paths (above) are not entirely harmless. With a few days of adaptation to the altitude (e.g. in Cuzco) and average fitness, it should be manageable for everyone. Once at the top, you will definitely be rewarded.
It is one of my 3 highlights (Laguna humantay, Montaña de siete colores and of course Machu Picchu).