I just started my channel in Feb of this year. I knew nothing of YouTube so i started getting involved with the communities that were interested in my topics. For example i cook healthy food, so I found a target audience who is ALWAYS looking for healthy food and went in the direction of Weight Watchers! There were hundreds of Facebook groups, forums, etc. etc. you name it. I embedded myself into this world, made myself known and started to self promote within these groups and forums. It's a slow process but in just a few short months I gained over 2000 subscribers who i have connected with on multiple platforms. Still a noob myself but it's worked for me!