I would also add to have a coach or trainer with you for a few times. I had a very bad fall and it has taken me a lot to get my confidence back. First make sure that there are no issue with the horse like saddle fit etc. if there was a bucking incident. Second start slow as the article said. I would encourage someone to be there with you. Third if at any moment while under saddle you get too nervous get off and work on the ground. Slowly you will get more confident and while riding keep positive thoughts and breath.