My dad when he quit the hobby left everything for me, so i guess family and / or friends is a good place to start...
I can just imagine trying to teach my lad about the hobby so he can take over from me some day. It'd go something like this......
Me....
"Right, Liam (my 14 year old), today son I want to talk to you about the nitrogen cycle".
Liam....
"What's that dad, is it one of them bikes like a BMX?
Me....
"No son, it's very very basic hobby related stuff that you need to understand in order to keep your fish alive. It involves bacteria called nitrosomnas and nitrobacter"
Liam.... (his eyes widen with interest)
"Oh dad, I know about that stuff, we're doing it in school at the minute, it blows stuff up, it's well cool".
Me.... (clenching my fists, my right eye twitching a little)
"No son, that would be nitroglycerin".
Liam....(a vacant look takes over his features)
"Oh ok dad, but that sounds boring, can't you teach me about that big fish you've got in the living room instead, you know that giant salami".
Me....(my temperature rising and my cheeks turning a deep shade of red)
"ARRGGGHHH, THAT IS A GIANT GOURAMI!!!!"
Liam....
"Can I go to my room now dad and play on my playstation, i'm exhausted after today's lesson".
And I could go on and on and on.