After writing my previous comment, I went back to your feed and saw you did indeed do some promotional material. I would recommend picking that back up, but more importantly I would recommend commenting on other people's posts to integrate yourself into a community. That is probably more important than the actual type of promotional material you create.

Just don't blatantly self advertise on other people's posts. Make relevant comments, and if people like them they are more likely to check out your channel.