Everything has been done, now you need to make an operative landing page to hold your prospects. Keep it simple, so more people can sign up for your webinar.
It is really difficult to get an audience to be a part of your webinar. You always need to look for a topic from your niche that is trending to be able to capture the attention of a large audience. Do some research and look for customer problems. Be relevant and informative with your webinar topic to encourage more people to attend your webinar.