when it comes to the birth of a gaming channel. Patience is key. You are in one of the most competitive markets on youtube fighting to gain subscribers. Since you've only been up for a month or so. I would take baby steps, although 100 subscribers doesn't sound like a lot. It really is a large milestone. But you have to ask yourself, what makes me and my channel different from the most popular gaming channels out there? Like PewDiePie or Markiplier for example. And is that difference good.
Also, and this goes with the baby steps thing, don't expect your channel to take off on your first few videos. It really comes down to each video you make. You have to be proud and happy with how your videos turned out. And then share them on Facebook, Twitter, Reddit, YTtalk, and other forums that you can find that allow that sort of thing. To tackle the goal of reaching 100 subscribers, you are juggling a large responsibility of being an entertainer, an editor, and a self publisher all at the same time. And that is just to reach 100. You have to push that even harder if you want to continue to keep those subscribers happy.
I wish you luck on your journey my friend.