Hi Viewers,
Greetings..!
There is certainly not much money on YouTube. Everyone knows that. But since you want to make some educational videos, it won't fade away soon. And can become a good source of passive income. Provided your content being grade A quality.
Considering the average CPM of $1.5, you will get $7.5 for 5000 views. So if you make some 100 videos and get 5k views each, you will earn around $700 to $1000. It can me more if you partners with YouTube's MCN, sell stuff, ask for donation etc. But for an educational channel, these won't work.
However, if this is your first time (or you won't ask this qs in the first place), then getting 5k views on every video is not going to be easy. It takes time, knowledge and resources.
IMO for edu channels, Content is more important than subs. For instance Khan academy has millions of subs but only get a few thousands of views on most videos. Why? Diversity. So stick with your niche.
Now, I don't want to discourage you, but here is the truth.
If you are not fully into this YouTube thing, then it's hardly worth the effort i.e. more input less output.
Initially, you will have to put a lot of resources -- time for research, money for equipment etc and you won't get anything in return for couple of months. Unless you have some past experience on YouTube.
Even when you start getting regular checks from Google. It's still not worth the value to put into your channel. (Similar to startups)
Most YouTubers do it because they love what they do, money is second. And even then, they have to ask for patron and sponsorship, just to keep the show running.
Overall IMO, YouTube is not a good platform for full-time money making. But a great place to share knowledge and earn some passive income.