The objective is to capture emails and gain visibility via social, and we know our target audience. The beta is ready for launch and we already promoting it on social. However, the brand connecting is missing somehow.
You missed the opportunity to try and describe your service here, I wonder if you're generally missing the ability to effectively describe what you do to who you think is your customer?
Strategy is simple. Tactics and implementation are where wins and losses are made. By "the brand connecting is missing somehow" I'm guessing you're saying you're getting underwhelming sign-ups. That points to messaging being off or it being accurate and no one cares about the service you're offering.
Given that you didn't provide any details where we could help (web link etc), you're best bet is to schedule a call with myself or someone else like me on Clarity that knows something about product positioning, customer acquisition and measurement and analysis.