Where did you actually learn to structure a deal, not just close one?

Curious how other people here handle it when a $5M deal lands and you're expected to analyze the DSCR, package the request, and defend it to a lender who's going to push back. Does anyone else feel like the “how to actually structure the deal” part is the stuff nobody really teaches, versus just knowing how to sell? I'd love to know how you guys learnt that side of the business?