In the Forums section showing new posts, I would like to start a post but cannot see any icon to start the new post
You must select the forum area you are going to post to before you see a Post New Thread button. Becaues the New Posts screen shows threads from multible areas, it does not have a New Post Thread button.
Note: The following screenshots may not look like your screen. I’ve set the forum to show me an older style/coler UI. However, they should be similar enough that you can figure out what to do from them
To see the list of forum areas, tap the Forum menu item (even if it is already highlighted).
Once you’ve selected an area you should see the Post New Thread button.
Also notice the path list just below the main and secondary menu. You can use this to move backwards to the forum area when in a thread.
The name of the thread or fourum area is just above the list of threads or posts.