Making your post beautiful is not really necessary. All you need is to make your post easy to understand and catchy that will make people read your post and learn too. Learning Bbcodes would do the trick. When adding images in your post will need a Bbcode use for images and other Bbcodes for table for example. Search for threads that are merited many times and you'll see how they create their thread useful and helpful. There are some post that are not beautiful and yet many people check it due to good quality and constructive.