Twitter influencers? You think you're going to start a successful business by following the right people on twitter?
My advice, find a problem, take the time to understand the problem space very very well, find some novel solution and implement it to the absolute best of your ability. It could be in any space, but if you want to focus on space tech, there are plenty of difficult to solve problems there. Start there, understand the ins and outs of it, find a problem you think you can solve and deliver value by working on it.