No need to fret, I’ll do what I can to assist! So you can create topics once you reach clearance level 1 - you are currently at clearance level 0. In order to reach level 1, please read this thread Understanding DC Universe Clearance Levels . Let me know if you still have any questions regarding that matter.
Once level 1, you’ll see this + New Topic feature you can click on/press when you’re looking at a topic area I(like Earth-2 Help Center where we are now)
As for your troubleshooting issue, you can go ahead and ask about it right here 