The game will SEEM devoid of all life until max level. (This was also the case with chocolate rift. It SEEMED like there was no one playing... Till level 50).
Deepwood is a pretty heavily populated server. 200v200v200 pvp fills up instantly, volan attracts 400+ players ect.
Heres a link that should give you a code to upgrade your trial account https://rift.trionworlds.com/account...=ascend_invite