Changed my domain name and can't access my network admin

I saw this in the previous forums, but nothing seems to be working. I changed my domain name only, and then went into php admin to make sure the name was changed, but when I click the network admin tab, it still directs me to the old site address. The new site name is https://www.cultureandconvo.com. When I click the network admin button I get the following message “Error 404 – Not Found

The document you are looking for may have been removed or re-named. Please contact the web site owner for further assistance. The address is
https://grown-woman.com/wp-admin/network/ (grown-woman is the old site name). I am thinking on uninstalling WP and reinstalling at this point. Would that work? Will I still be able to use my blog name? Any help would be GREATLY appreciated.
Thank you so much.