If you already created the personal space, which you can do only if you have the global permission, you should be able to edit it. You are the owner of your personal space and you do not need any other permissions.
You can, of course, configure permissions for others. See https://confluence.atlassian.com/doc/create-your-personal-space-777010869.html for more details.
Thanks for your response Jobin.
Actually, my personal space was created for me (was already there when I first accessed Confluence).
I've added a screenshot of the options I have in my space Homepage and of the permissions I have. As you can see, I don't have the Edit button. Any ideas as of why?
I appreciate your help!
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