The beginners may be escused for a time depending of the dojo where they are practicing in, but any kenshi needs to wear kendo-gi and hakama and you should know how to get them on. This video shows how to put the kendo uniform (kendo-gi and kendo hakama) on - the uniform we wear under bogu (bogu being the armour). Kenshi, or kendoka, is the person practicing kendo.
The way we put kendo-gi and hakama on is different from other martial arts so this video helps you to understand how kendo people put their kendo uniform on. The video may show very different things than the ones you have learn but in time wearing the kendo uniform becomes normal and all of the things need to be done to ear them become a routine.