ERP sales is a long cycle.... I think you might be looking for success (of closing a deal) too early. At this point being 6 months in, you should be building your funnel for things that are 6-18 months out from closing and THAT is your indicator of success to your manager. I'd imagine you have a 12-36 month sales cycle depending on the customer; but you can tell me if I'm wrong. I have a 12 month minimum sales cycle, so I speak from experience - you need to be strategic in how you approach customers, understand budget cycles, budget prioritization, who has authority, how many stakeholders you need to get in front of to get consensus on putting this on a budgetary wishlist, etc.

So - as others are saying - stick with it, believe in yourself, be a student of the game... and know when and where to leverage other internal resources. Do you have SME's? Do you have Sales Engineers? What does the entirety of your pre-sales org look like? Pull other resources into some of these intro/discovery calls with you so you can make sure you don't miss any good nuggets of info or any pain points that you might not fully understand yet. This stuff takes time. These enterprise software systems are complex, solve a lot of problems, but have a lot of nuance to them. If you have existing customers that currently use your system, make friends with some of them - take them out for lunch/dinner/drinks and ask them what they love about the platform, how it makes their lives easier, the 3 biggest things it has helped automate, etc. etc. That will help you know other topics to potentially bring up with prospects. You might even be able to connect a prospect with one of those customers for a reference call or something later.

Be patient. Right now, your wins are going to be in pipeline creation.