Dungeons and groups, where to start?
yes you can start at 30 for ascalonian catatombs story mode. I suggest leveling past that though, it’s pretty brutal.
Basically there’s no real level restriction, just recommended minimum levels. You could do fractals on level 2, but it’s a pretty unspoken rule for you to be 80. If you’re doing it with guildies or friends they might be okay with you being lower in level though.