Best when one selects a possible proper sub-forum for a new discussion, topic, question.
Here for example in the Info-subforum (att1)
Once the sub-forum is opened one does not only see the topics there but can. also create a new topic by pushing "new topic"-button. (att2)
Once pushed the text-editor will be opened. At the first text-box the name of the topic is required. The big text-box is for your words and if chosing attachments below one can attach pictures, audio... what ever.
Once thinking "fine so" just push the button "post".
Don't worry, one can modify ones post and it can be moved elsewhere as well.