For a more detailed guide on growing I'd suggest going to the Tips, Tutorials, and Guides Folder on the forums. As well many moderators link the Marketing & SEO folder as well as the Channel Review folder.
But my advice is to Distinguish your main color scheme in your profile picture as well as your banner. I see you have purple here so stick to that color or change the background. As well you've set a "Business" logo in that lion you could say as it is the main icon of your channel. Try doing a few giveaways at small milestones and have the participants subscribe to you for, let's say, a free logo and banner for their channel. This isn't the easiest way to grow and the most cost-efficient but it will show your commitment as well as your love and interaction with your subscribers.
As stated in my first two sentences go to those folders, they should be easy to find on the home page but I sadly can't link you to them as it blocks actions such as linking websites on this forum ( Which is actually a good thing ).