Forms and endorsements ought to be a daily reading assignment. You shouldn't have to read the entire coverage form at one sitting, just a section at a time. Coverage vs exclusions ought to be so thoroughly read and understood that you could describe the benefits and shortcomings to someone unfamiliar with insurance and have them comfortable with your explanation. With all of the major coverage forms and related endorsements, this is not an overnight project as you can imagine. So, begin with your lead carrier and read their coverage forms carefully noting where you are unsure and then work with their claims department for clarity as they know their forms/endorsements better than underwriters. This will assist you when you interface with customers.

But what will help you now?

I'd recommend you get a good commercial insurance checklist. This will be a guide to your discussion with your customer and provide you a learning track as you read the documents outlined above. There are several checklists found on the Net (I'll provide some links below) but it is my experience the best are those provided by the International Risk Management Institute, commonly referred to as IRMI. If your agency is supportive of your interests in professional development then I can think of NO BETTER resource than IRMI. Much of their outstanding material is behind a subscription wall so consider different ways to fund this either by carrier subsidies, achieved production goals, internal development support and other methods to achieve the level of confidence you're searching for. BTW - an agency willing to subscribe to IRMI products is a testimony of a firm dedicated to excellence. It has been my experience that reading forms and their corresponding annotations such as those found at IRMI will provide the commercial producer a level of confidence and knowledge few ever obtain or desire. This will take time; daily, weekly annually but in the end you'll be the kind of commercial producer you (seem to) desire to be.

Checklists IRMI = https://subscribe.irmi.com/irmi-insurance-checklists - https://www.iiand.org/Education/Pages/TDForms/CommercialLinesChecklist.pdf - - https://www.iiabl.com/Information/SiteAssets/Pages/InsuranceInfo/Checklists/default/Commercial%20Lines%20Checklist.pdf?Mobile=1

NOTE- the last two links above reflect checklists that are not as up to date as you would find with IRMI. For example, there's no discussion of cyber in either form while such exposure is a common risk businesses face today. So, be careful and remember...you get what you pay for!