How about you start creating content, comment on other YouTubers that have similar content and take your time?
The quick and easy answer is: There is nothing you can do to make your channel take off. It does, or doesn't. If you are about the numbers you can bet your behind you have a higher likelihood to not succeed at all. People sniff those people out a mile away. How? Because those people create threads bitching about slow growth, comment "check out my channel plz" on big YouTuber pages and can't take a hint that their content just doesn't resonate with anyone.
Me? 1.8K subscribers over the course of 2+ years. Good? Nope, not at all if you are about the numbers. But, I couldn't care less about the subscriber count. It's the community that counts. And guess what? The more you are part of the community, the more the community will be a part of you. And that in itself is very fulfilling!