Questions for the Amp tech guys

Hi I was wondering how did u guys get started on reapiring amps, and I mean mainly tube amps? I would love to learn and maybe one day build some tube amps for my own enjoyment. Anyhow did u guys take any college courses or did u just tinker around with equiptment? Are there any websites that I can go to and get more info?

Any comments or suggestions will be greatly appreciated.

Thanks
Rodrigo