Here some resources I found useful to do first B2B sales and get a general understanding of the process.
1. Peter Levine course of sales for tech entrepreneurs https://a16z.com/2018/09/02/sales-startups-technical-founder...
2. Steve Blank's 4 steps to the epiphany https://www.amazon.com/Four-Steps-Epiphany-Steve-Blank/dp/09...
3. Close.io SaaS Sales Book https://close.com/resources/saas-sales-book/
4. The Sales Acceleration Formula: Using Data, Technology, and Inbound Selling to go from $0 to $100 Million by Mark Roberge https://www.amazon.com/gp/product/1119047072
Also I advice you to fasten you educational feedback loop as mush as you can.
The last boo can help you with metrics as well.
or the better one:
study -> try selling -> success -> study even more
My claim is you don't have to do, say, MBA to study sales.