I have searched all over the forum for this topic and found some related posts, however, I still have a doubt. I know that once I created a site, I cannot delete it. However, when I was creating my sites, I had a problem with browser, or connection, and I received an error, so I had to go back and, when doing this, forgot to change the subdomain I had chosen before the problem. Basically, I want to know if I can change my recently created sites from xxxxx.zqx.net to xxxxx.zzl.org (keep the same name I chose, but changing the subdomain you provide), or if I have to ignore those ones and create a new sites instead. I really appreciate your help since I have been working on that for a long time. Thanks a lot.-

Afraid not, the hosted websites are mapped via the domain so swapping the domain isn't possible without reproducing the directories etc, which you can do by registering for the account.