Does that mean we can't get GitHub student ourself?
If you wanted to get the GitHub student pack only then you can do that without the edu email only. Yes, you heard this right you can get the GitHub student for free without any .edu email. For this register to GitHub using your Gmail account. Go to the student benefit portal and apply for it. It asks for your academic proof (for this you can submit your 11th or 12th grade admit card, identity card, or mark sheet/transcript). Note, The name of such documents should match with the name of the GitHub account that you created and the Gmail account you created.
Still worrying because you don't have the transcript and all stuff. We have already shared this stuff on our telegram channel you can get it from there.