Turn on the Call conversion tracking in Google Ads, and this will include setting the call schedule so ads don’t show outside of business hours in order to reduce the cost of the campaign. Set the device preference to Mobile since most calls are made from mobile devices, set Google Ads to count only 1 call conversion per click in case the same user returns to the same ad multiple times since you don’t want each click to count as a conversion and set a 30-day click-through conversion so that you only count people who click the call button on the ad and who also submit the form on the website within 30 days of clicking Call.