I have a little gift for you this year.
I just added a course from my paid group to the classroom, and it's available for you for free till the end of the year. If you're on the premium tier it will stay free after the new year too.
The course is a bit over an hour, but is divided into nice short digestible chunks, so you should be able to plow through it in one sitting. The course is called Sales & Marketing Basics and it should quickly bring you up to speed in terms of the foundational concepts of selling and marketing. Let me know how you like! And have a great Holiday!