Use a tool. You should not be explaining everything about your opportunity or whatever it is you have to sell over the phone, point them to a video, sizzle call, event in their area, anything but you try to explain it all over the phone. You can say “The first step to see if this is even a fit for you is to watch our short overview video at ________________”
At the other end of the spectrum is buying leads. This is also not the best option since it can be very expensive and may result in leads that may not actually be interested in your products or business. These are not great leads, either. The best leads will always be the ones you generate yourself—people who have shown some sort of interest in what you have to offer.
Working with your various leads should get you somewhere, or else you need to rethink your plans. If you find that engagement is still low after you try yourself to get leads that turn into paying ones, you should just buckle down and study on what you’re doing more. Anyone that wants to be successful has to alter what they are doing so that they can get more from the people they are working with. You really need to get this underway or else it’s going to end in you wasting time with leads that won’t pay off.