If you want to know more about Lost Ark, you can look up this guy channel https://www.youtube.com/channel/UCWajiTYyiwalcfbJO-bDVpQ/videos
His "Discovering Lost Ark" videos are pretty good information.
Dont know why people are stressing about launch, server full? Server transfer are free, just switch your guild/alliance to a lower pop server, where everyone can choose it as their home server. Problem solved.