You can do it easily but wait for somedays because corona is not finished till now. trekking towards Kedarkanth is amazing and it can be done by non trekkers also.
Do some exercise, but good trekking shoes, take you thermals but only wear them during night, take good torches, hire a local to guide you for navigation, do try local food, try making new friends with locals...And dont use more phone, just observe and embrace the beautiful and magnificent mountains
No need to cancel if covid situation is under control till that time..As of I know, Kedarnath is very basic trek and no special trek experience require.Since you will be covering this aprx 16 km trek by walk(if u'r nt hiring horses) make sure you practice walking or running to build stamina.
Go for it... it's ok to be 1st trekking
think you will get great memory for 1st time trekking.. just keep precautions
watch videos related kedarnath so you will get proper instructions