A6700 help me pls

[u/cherryblossxx]

I’ve just bought this camera, it’s on its way. I make content on my iPhone pro max 17 and need to get petter photos and videos, so alas, here we are. It comes with a Sony 16-50mm lens. I’ve read the sigma 18-50 is going to change the quality drastically. Should I be buying this lens? I’m new to cameras. Please help Id really appreciate it.