Re: "as owner of apple one account i cannot set up family:
i get message that the account I am using does not have ownership but I am the owner."
Am no expert in this area, yet your request deserves some response.
Which Apple One subscription do you have: Comes in three types: Individual or Family or Premier
Assuming you have Apple One Family subscription:
You would need to be using the one same Apple Account details as the Apple One Subscription in Family Sharing
You could first check that you are signed in (to your computer or device) with the correct Apple Account details:
See: Sign in to your Apple Account - Apple Support
(Tip: Your Apple ID is generally an email address ... in some countries it may be a phone number.
An Apple Account password is necessary ... If you forgot your Apple Account password - Apple Support)
:
You might want to see if you can Set up Family Sharing - Apple Support using Apple's online guide.
If all ok so far: See: Add a family member to your shared subscriptions - Apple Support