Switching from the built in microphone to one that sits on top of the camera is the first step in getting quality sound. Whether it’s your primary audio source or simply offers a clearer track for syncing in post, external mics are the way to go. They help to eliminate handling noise and are often directional to help reduce random sound coming from your environment.
The Saramonic MixMic is one such system. Although designed primarily to be used as a on-camera microphone, it offers a lot of versatility. It’s comprised of two main parts. The MixMic XLR Adapter itself, and the Saramonic NV5 microphone. And you can add a second microphone if you wish. It offers features that you can grow into and expand upon as your abilities and needs increase.