I would like to go to my first convention and meet some of my childhood power ranger heroes. Where do I start with looking into conventions? I fear the cast will retire from appearances and I'll never meet them. I'm California based. Any advice?

I'm huge on MMPR especially the OGs and would faint if I got to meet them. I have never even tried or bothered because I have a terrible fear of flying, and I notice they usually stick to Atlanta area. But I'm willing to fly because I fear missing out and they end up retiring or something. Where can I go to see who is at what convention or where the closest to me might be?

Thank you!