I would imagine you would need to learn how to be a "Sales Engineer" on top of being a solopreneur. I've been one for a long time and put together an ebook that I would be more than happy to provide you with. All I ask is you give me your feedback on the content I put together. I'm working towards something else but created the ebook to see if it resonates.
I'm feeling sales-curious myself as a currently rather technically-focused student. Find me at https://github.com/kartva/ and my email at sendtokartavya at gmail dot com.
(I didn't see an email in your about so this is the best way I know to contact you)
