I have practised these things by preparing what I think I need to Post and then do a preview which, I hope, shows what the Post will look like. Then simply use the Browser " back " button so that the Post is never actually submitted. Seems to work for me or am I missing something ? Perhaps a FYI Guidance Post would help ?
The thing I had most trouble with was deleting images posted by me, I did eventually find out how but it took a while !
Am I correct in thinking that you cannot delete your own Post ? I know you can go back and edit but the actual " slot " your Post was in still remains, embarrassing if you have made a fool of yourself !
I do think that some sort of FYI Post would help though, particularly for those not used to Forums, and I include myself in this category. I am a member of about 4 and really active in one only, AO. Sorry fellow AO' ers for inflicting myself on the rest of you !