I mean, technically you could just scroll through all of them. The Boards’ software can’t tell the difference.
That being said, you’d probably be better off reading through a topic that actually interests you. You’re bound to find something if you use that advanced search picture.
When you create a new post, there should be blue text that says “Upload”. Press that, and you can either take a live picture to upload, or choose from your phone’s current library.
For example, I’m on mobile right now. If I press upload…
On mobile there should be an upload button in the bottom right hand corner. On desktop in the upper bar, there should be an arrow pointing upward, just click on that