The first thing you need to do is get your youtube channel seen and to let others know about it. For eg. my youtube channel is DartyMcFarty TV. So like me show and let others know about your channel.
You can promote your channel on different sites, for example here, just make an introduce your self page and people will get to see it.
Or maybe just promote your channel on youtube by collabing with other youtubers.
Theres a system on youtube where you pay money, youtube will help promote your channel to other people, and you can get new viewers or subscribers everyday. Or maybe just make awesome content that everyone likes, eventually people will notice your channel and spread the word xD
Hope this helped xD