Hi Annali, yes, thrown in at the deep end, the best way to learn, but it can be a nightmare, been there, done that, so you are no alone.
For the things you want to do, where do you want them displayed? That is really the key. If you want them in a block, you might want to use the Calendar or Upcoming Events Block, or Latest News Block, which are either default to courses or which can be added to all courses.
Alternatively, you can ensure that when a course is created, this information is held in the header section of the course. You can set a course to "Hidden", via the cron, as the document linked explains. Or you can run an SQL and hide the course via the database. in the Course table, the field "visible" is usually set to "1", you change that to "0" and that should hide the course.