I encourage you to read some answers of mine to similar questions asked on Clarity below.

The value of Direct Outreach: https://clarity.fm/a/2149

Understanding your customer acquisition costs: https://clarity.fm/a/611

Using Twitter for early outreach: https://clarity.fm/a/438

The most important thing to do is to qualify your users to ensure that they really are the people that really feel the pain for the problem you are solving. Offering them early access in exchange for a quick survey is a tactic I've used with pretty good conversion.

Happy to help talk through the specifics of your path forward in a quick call.