Sales Training for Sales Team

I have a wholesale operation that specializes in virtual nationwide novation deals. We do some traditional cash wholesale deals as well; but, I'd say we're 90% novation and 10% cash to give you an idea.

We generate inbound leads on Meta and have sufficient lead volume for our in-office sales team plus a database with several thousand leads that have been generated via Meta, TikTok and Google PPC over the past 10 months or so. That said, lead flow is not currently the problem.

Currently we're having an issue with closing so it's become one of my top initiatives to figure out how to effectively train and develop my sales team. Does anyone have any recommendations for what I can do to effectively and efficiently train my sales team to close more deals?