I think you can't do it yourself while you are still a
new user - iirc we had a similar case a few months ago. It is probably assumed that changing these fields very soon after registration is suspicious. We have to deal with a lot crafty spammers, so we apply a whole arsenal of countermeasures. Not for fun, but because it proved necessary. Certain limitations for new users are an important part of that. Sorry for the inconvenience.
I guess, you will have to wait for an admin - but these fields of your account are empty now? You should probably leave the correct info here, if you want it changed, and to speed up the process.
As a
regular user, you should find the fields for google, facebook and github here:
https://www.autohotkey.com/boards/ucp.php?i=ucp_profile&mode=profile_info
A change of the forum username might also require an admin for normal users, not sure. These things don't get requested much.