Ive just created a folder and now my macbook wont let me rename it

Okay, so we are making progress!

To access sharing and permission settings for a folder on a Mac, follow these steps:

1. Select the folder in the Finder and choose File > Get Info (or press Command+I).
2. In the Info window, click the triangle next to "Sharing & Permissions" to expand that section.
3. Click the lock icon and enter your admin password to unlock the settings.

Is the folder in question giving you read and write permissions?

To change the name of an Item, you need read/write permissions for the item itself...

... AND read/write permissons for the Enclosing Folder.

What is the location of the folder? (Eg. Desktop, Documents folder, Library folder, etc?)