1. can I change name of the gallery xxx.photoshop.com to yyy.photoshop.com
2. can I dalete my account and create another one with another location with this same email addres?
3. where/how to check my fallowing post?
1. Yes you can change your xxx.photoshop.com URL by changing your 'username' on your My Account Page (Under Me>)
2. If you would just want to change your 'location', you can update your country/region on your My account page.
You can delete your account but you may not be able to use the same email id to create a new account. Word of caution : you would also lose any photos/videos you may have in your account upon deletion.
3. You would receive an email notification (if enabled) on any postings on this thread.