We would need to know what your youtube channel is about to give anything really helpful, however, general rules today are to try and make a social media presence by being involved in multiple communities with constructive responses (don't just spam post, that'll get you dislikes from annoyed people on those websites). As for the channel itself, general rules are simply to always try improving your presentation and refining your content.
"How to grow my channel?" questions like this are too general and this question has been asked and answered lots of times already. Since the answers don't really change, these threads get locked. Otherwise the forum would be full of them.
Here are some sections to check out (but there is no need to start a new thread):