There is a ton of advice on what gear to buy and what gear not to buy as a photographer. It is written from a billion different standpoints, each one with a slightly different take. I didn’t feel any of those articles resonated with me, so here is one that I hope will resonate with you regardless of the genre or niche you’re going for.
advice
A Beginner’s Guide to Choosing the Right Focal Length for Photos

Perhaps no choice is more fundamental to and impactful on your images than the focal length you employ. So, how do you choose the right focal length for a photo? It is a more complex question than it might seem on the surface. If you are new to photography, be sure to check out this fantastic video tutorial that will show you some helpful advice and knowledge for choosing the right focal length.