Presets for Lightroom are basically a must when it comes to success on instagram. You want your feed to have a cohesive look and a common color scheme helps create that.
Presets also help you show that you take your profile seriously and are committed to taking quality photos. This is something you want for future brand collaborations!
I compiled a list of quality and low cost presets on Etsy for you all to take a look at and maybe try out.