@Kinbaryu
I think, to run a successful YouTube channel you have to be passionate about the subject, one thing you could do is research other YouTubers in the same field to see what they are talking about, and then but your own spin on it, if that makes sense?
I do know, from past research, the YouTube algorithm looks for consistency in uploads and engagement with the community, if it's possible try to upload one video a week, on a specific day of your choosing, that would help your chances of being recommended by YouTube.
For the engagement with the community, visiting other YouTube channels comments section and engaging with the community there is counted as an advantage for your algorithm result, because the algorithm see's you as an active member of the community, and once you upload with consistency your videos have a greater chance of being shared in the recommendations on YouTube.
To follow on from above, if your engagement with the community on other YouTube channels is of good quality, you are likely to have a greater chance of people there clicking on your YouTube channel name in the comment section.
One thing you could do while in the comment section of high profile YouTube channels is to look for recommendations by people in the comment section, as there will be times the community will make recommendations to YouTubers within the comment section, but high profile YouTubers are likely very busy and have a greater chance of missing recommendations in the comment section, so, you could help the community by filling in these requests.
I hope the above helps in some way