In step four you describe what sort of person you are interested in meeting, which accompanies the description of yourself.

Everything except your username can later be changed, so don't worry if you make any slight mistakes.

When you're ready, select the Continue button.

You now have the option of adding a photo of yourself. If you have one handy, you might as well give it a go.

Select the Browse button and find the photo you want to add and select the Upload image button.

If you don't feel like adding a photo right now, or don't have one to hand, select the Skip this now and continue button - you can always add a photo later.