Just goofing around seeing how the ‘new post’ works!
Sorry @roy1954 it looks like I might have put you crook slightly 
As Gavin said… Click on new topic within the catagory (top right) enter text and pics etc. then when ready as I am about to do click on ‘create topic’ bottom left.
Just got a pop up saying title must be at least 15 characters.
This time 5 4 3 2 1
Yeh that worked at least on iPhone I’m guessing desktop will be the same or very similar.