It is too wide of a field for self-study outside a curriculum, but a sub-set could be tackled IMO. Find your niche interest and go online investigating opportunities.Graphic design is a craft where professionals create visual content to communicate messages. By applying visual hierarchy and page layout techniques, designers use typography and pictures to meet users' specific needs and focus on the logic of displaying elements in interactive designs, to optimize the user experience.
Maybe an overview at YouTube: https://www.youtube.com/watch?v=pz-lwONtVmM