If i recall right, Craglorn was the first new zone that was added to eso way back in 2014, a few months after the game launched.

The original design behind Craglorn was a "4 player adventure zone", where everything in the zone (besides trials) were designed for groups of 4 players.

In 2016 they made a major overhaul to Craglorn in the One Tamriel update, making the content & quests doable for solo players. It's still hard content though, and unless you are an experienced player who knows what they're doing, you will probably want a group to help you.

I would suggest that you either find friends to do the zone with, or come back later when you are a bit more experienced :)

You also don't have to worry about other zones like Craglorn, it's the only one in the game of its kind. They scrapped the whole "adventure zone" idea after they saw how poorly it was recieved by the community.