Your target market: SEO is not meant to garner as many web traffic as you can to sell your items. Some geographic conditions and the customer demographics are very much important as to where and how you will get your customers. Fine tuning on these parts will make you confident and successful going forward. Google Analytics will help you in your investigations on these factors.
When starting out, focus on being a generalist. You won’t know what you’re most interested in yet, so building up a general digital marketing skill set will help you hone in on the areas that excite you most. You’ll also be more hireable since a digital marketer who can wear a few different hats is much more useful than one who only knows how to do Instagram ads.