You claim to have solved a problem. You also claim you know the target audience. Assuming that within that target audience your solution to their problem is worth the price you are asking.
Then the issue of marketing is reaching your clearly specified target audience and communicating the availability of your solution to THEIR problem. You need to convey your belief in your product to them. i.e. evangelize. Of course, you need to go to where your targeted customers are. No use talking to folks in your office if they are not the buyers. Promoting on HN, etc is only applicable if your product is for technical folks. SEO might work if your re-frame your keywords to be the words that your potential customers would use to express their search for a solution.
A useful way to get ideas of how to market your product is to identify several products that solve adjacent problems. Then look at how those products are being marketed. It is also instructive to look at how sales grew for those products. For example, don't look at Apple iPhone market as it is now. Look at how Apple started back in the 1980s.
Then the issue of marketing is reaching your clearly specified target audience and communicating the availability of your solution to THEIR problem. You need to convey your belief in your product to them. i.e. evangelize. Of course, you need to go to where your targeted customers are. No use talking to folks in your office if they are not the buyers. Promoting on HN, etc is only applicable if your product is for technical folks. SEO might work if your re-frame your keywords to be the words that your potential customers would use to express their search for a solution.
A useful way to get ideas of how to market your product is to identify several products that solve adjacent problems. Then look at how those products are being marketed. It is also instructive to look at how sales grew for those products. For example, don't look at Apple iPhone market as it is now. Look at how Apple started back in the 1980s.