Share it on social media and create a page on social media and build content on it and drive people from there to watch your YouTube videos. You can also try to optimize your video by adding keywords in the title, description, and tags. There is a tool vidIQ you can try that for optimizing your content.
The key element in starting a YouTube channel or anything for that matter is motivation and expectation. Do you want to earn an income, help someone, or prove to someone you can do it? Have a clear understanding of what your motivation is and what you expect to get from it, and that it could take a long time before results begin to show.
Choosing a topic for your channel: The most important decision of the project. Your topic should not be too broad, yet not too narrow, appeal to a specific or targeted audience; and something that you are passionate about. If not, you will soon get bored and quit when faced with hurdles that must come.
Before posting any videos, do some research to find places to promote them to. Social media platforms are an excellent place to start posting your video links but make sure to follow their rules.
Apply SEO to your videos. Because Google owns YouTube, they will rank your videos in google search in a matter of days; faster than they would most websites. If you are unable to do this yourself, outsource the task; this is an extremely powerful strategy.
Lastly: Try to avoid making your videos with studio-like special effects and a lot of bells and whistles. If it is possible, shoot them in your workshop, kitchen, living room, office, etc., with you looking into the camera and speaking to your audience; no special effects. Apply whatever is appropriate but make things simple. Do what it takes for your audience to feel and connect with you. These are the types of videos that produce massive results. I hope this helps.