I can't think of anything worthwhile to write about
That's your first topic!
Generally, when in doubt, start by describing how specifically you are in doubt.
Oh, and you should probably do it under a pseudonym. So that you can later pretend it wasn't you. You will develop some skills when writing, but then you might want to burn the evidence that your skills used to be low.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.