Would it not be better that the whole thread disappeared when you delete your thread ?
You delete your own post, not any thread. To pilfer from @marilynluvstigger et al: Welcome to the internet.
You will be okay, Feologild. No one is judging you; I can't understand why you want to delete the threads from which you do delete your original posts, or even why you want to delete your posts. You have interesting ideas, nothing to be embarrassed about.