I've submitted a 'test' page in the form of a preview ad and now I just want to know how long will it take for me to see displayed on the homepage?

That way I will know the time between submission and display.

P.S. If this was a pre-answered question, sorry I couldn't find the topic/forum.

I'm not entirely sure about what you're asking...
-But if it's how long does it take your comic page to show up, then the answer is: straight away! :)

According to your comic account details you haven't added any pages at all to your comic yet, so nothing will show up...

The other thing I should add is that you can set pages to be displayed on a specific date, so you can delay when they show up if that's what you want to do.