Coming from a person with a Y-ouTube channel with more than 50 s-ubscribers, here are some tips if you want to be serious about starting this.
1. Don't ask for s-ubs. It never works, and it won't ever. That's not a good way to promote your channel. Especially on a school website. You have to work hard for your s-ubscribers, because if you ask for them, you won't have real fans. They'll only be there as a number, not viewing your videos, just staying there. I don't ask my viewers to s-ubscribe, because that's their choice and I don't want to force them to do anything. If you don't ask for s-ubs, people will view you as a person who cares for people's opinions and doesn't tell people what they should do. Also, you have to have 1,000 subs, 4 live watch hours, and more than 10k views to get paid.
2. Don't post random videos. Set up your channel first. If you post random things, your channel won't grow at all because people only s-ubscribe if they really like the person's original content or the person themselves.
3. Remember, quality not quantity. Just because you post multiple videos, doesn't mean you'll get many views. Quality in this case means to put real effort into your videos. Taking the time to make thumbnails, full descriptions, etc. Quantity means that you only care about how many videos come out.
4. DON'T COPY OTHERS. Make your own content (also don't clickbait). If you make your own content people will s-ubscribe for your originality, and they'll be more interested in your content.
5. Look at your comments and interact with your s-ubscribers. Y-ouTube loves that. Don't ignore them, and make them know that they're special.
6. Take criticism. I'm guessing since you became a Y-ouTuber, you already know that you're bound to get hate. If someone comments something rude, delete it, block the person and move on. Don't start a meaningless argument. If someone gives constructive criticism, just respond with something like "Okay, thanks for the feedback!".
I hope this helped you learn more things about becoming a Y-ouTuber :)