YouTube: I love this place! You can find video training's on just about everything! It can help you with a lot of the tasks that you need to accomplish for your goal. So if you want to "sell products using Instagram" and one of the tasks is: post beautiful photos with text on my feed often, then you probably need to go on YouTube and search for "how to design an Instagram post, if you don't know the first thing about it. You can use YouTube to help you accomplish goals or tasks on your list that is out of your skill set.
While you have a decent starter shop, it's important to keep in mind the projects that your tools can handle. You are going to want to focus on projects that don't require your stock to be ripped to a different dimensions than what you purchased it at. You are currently only set up to do crosscuts with your miter saw. So while you can turn an 8' 2x4 into two 4' 2x4s, your not going to be able to turn that same board into two 2x2s.