Hi and welcome!

The only way to convince him, imo, is by not trying to convince him, but just being yourself. Words often don't inspire trust, actions do.
So, ask questions about it.
Read about it.
Ask about his experiences and likes/dislikes.
Share new and exciting information regarding this with him.
If you immerse yourself in this new interest he will notice the sincerity of it and respond.

New things in this world often has that same push / pull effect, I found. But if you stay open-minded and safe, you can really start to explore all aspects of your heart and mind.

Good luck and have fun!