I have been to kedarkantha trekk few year's back n trust me it's super awesome .. you will fall in love with it . I would suggest you to do booking from any travel agency , we did the same , it includes everything from your stay , food , travel and all. if you want you can contact moxtain group .. we booked from them . ppl in that group are really helpful n nice.
You get Buses from Haridwar to Gaurikund and from there you have to trek / Helicopter Ride or Pony Ride for reaching Kedarnath. Hope you can go ahead with your trip looking to the present Pandemic Scenario.