So I faced/facing the same issue.
In general before you do any sale you need leads. I.e. you problem is not selling, but prospecting. I.e. you need prospects at the top of the funnel.
There is very good book - "fanatical prospecting" :
https://www.amazon.com/s?k=fanatical+prospecting
So your first step is to raise awareness of your product.
To do that there are two way - inbound (blogs,etc) and outbound(cold call / cold email). For inbound, you need to provide value to customers which are not related to your product. I.e. first earn trust and give value.
For outbound, the key is lead filtering, I.e. looks for signals that would qualify your leads (e.g. sector, traffic). But in general outbound is a numbers game.