Followers doesn't (necessarily) equate to sales! You can have 1 million followers, but it's pointless if they're not buying anything.
I can give you a perfect example: a local musician had over 5000 subscribers to his newsletter, so he decided he'd get a C.D. recorded (this is a good few years ago now) because he felt even if only 10% of his subscribers were to buy a copy it will have covered the cost. He got a C.D. done... not a single subscriber ever bought a copy.
I am guessing you want people to see your posts on Instagram and then go to your shop, so follow
@YasmeenLondon's points 3 and 8 especially.
Engaging with your target market is one of the fastest ways to get people to notice you and come and check your account. But do meaningful comments on other people's posts, don't just be salesy, make your comment appropriate to what has been posted. Yes, if you have a product that answers a need, there's no problem with commenting about it, but don't go over the top.
Don't come over as desperate, it will drive people away and DO NOT send direct messages trying to sell to people (this is a technique used in the early days of social media and is guaranteed to get you a bad name and blocked).