apple watch update

after getting a new phone at the start of the year i have tried reconnecting my apple watch (no longer paired with my old phone) and i need to update my watch its not properly paired to my new phone as it says i need to update the watch, i tried installing the update and it hasn’t given me an estimated time the watch is stuck on the white clock after resetting and can not get into it to connect my hotspot, how can i get it updated? TIA