Once you hit VIP status you'll be able to edit your own posts. We used to have DMs more open, but Admin shut them off a bit ago for most users. I know we were getting some real bad spam and abuse in DMs so that might be related. It also might just be because your account is 2 weeks old. I don't really know, tbh.
Anyway, if you need to update links on any posts you should be able to use the report button on the post and put the new link in the post. We've been able to update posts in this way before.
Anyway, if you need to update links on any posts you should be able to use the report button on the post and put the new link in the post. We've been able to update posts in this way before.