Yes I think possible. 1. sales aptitude assessment tools like Objective Management Group (the one I took) help you identify core weaknesses that are critical to understand and work on. 2. Recording your sales calls (assuming you're on the phone) and then asking AI to critique it and coach you, with the above assessment as context, could be very helpful.
If you're disciplined I think the above approach may be a pretty good stand-in for a real coach. Or at least help you evaluate a coach better should you choose to pony up for one later.
I'd be careful sending raw audio to public APIs given the sensitive commercial info. A local pipeline with Whisper and Llama 3 is viable now and solves the privacy issue. It also keeps the long-term inference costs much lower.