All comes with experience. I have my own opinion on this. Of course you need to track incoming calls. Call tracking is an important tool for every business. Do you already know which company you will ask for help? I can recommend several services. Here is the site https://callgear.com/this is the first service I cooperate with. There are also https://www.callrail.com/ also good. Check out their services and choose the one that suits you.