How do you get others to learn before jumping in?

I always recommend watching videos on YouTube. Not only can you learn from different people, but if the person in the video is making a mistake, the comments will call it out. It is really good for learning about different tank setups and what it takes to maintain them. You can learn a lot about different fish too!

I 100% agree with Li0nFish here - show them some good articles, or videos that go over the concepts. I try to also show them the negatives (such as sick fish, tanks not taken care of correctly, etc.) to show them that a little knowledge beforehand can seriously make these fish thrive and act as they would in the wild, in your own tank.

YouTube videos have helped me a lot in learning many new things about the aquarium setup, choices of fish, on the whole the process. Researching helps a lot in this process.

For me it was a combination of both youtube videos and personally visiting the aquariums set up by my friends and neighbors and they have been very helpful in guiding me in setting up my own.

Quote from darrie53

I 100% agree with Li0nFish here - show them some good articles, or videos that go over the concepts. I try to also show them the negatives (such as sick fish, tanks not taken care of correctly, etc.) to show them that a little knowledge beforehand can seriously make these fish thrive and act as they would in the wild, in your own tank.

I remember watching a video where a woman got a tank recommended by a pet store worker, it was a round one. The people in the comments pointed out how bad these are for fish and how stressful these sorts of tanks could be. She went back and changed everything and apologized.

Are you asking what resources one should recommend to others to get them to care for their fish appropriately, or are you asking how one should go about convincing them that it's important to care properly for fish in the first place?