Powershell – SPOConnect throws error when connecting to a sharepoint SITE

I’m having trouble connecting to my share point site. I belong to an to an organization and was tasked to create a community page/sub site thats customized.

I use the connection string from the API

Connect-SPOService -Url https://contoso-admin.sharepoint.com -credential

except that I’m not connecting to our main orginzations sharepoint site, but sort of a subsite under it.

my URL basically looks like https://orginizationsite.sharepoint.com/sites/NameOfSubSite

and i get thrown this is not a tenant site.

Are we even able to customize these kinds of sites” or do i basically need admin level access to the organizations share point?