Players often complain that it’s impossible to knock out one first Thrall from the Wild Surge if you play solo. I’ve found rather long but not so hardcore way to do it.
First of all, get yourself a decent battle Follower. Island Lynx will go, they are rather tanky, even ordinary ones.
You don’t have to look for a kitten in the wild, just farm Gold, make 200 Gold Coins, SWIM all the way north to the Outcast Camp and buy it. It’s completely safe even on lvl 1 for today.
When your Follower is ready “take it on a short leash” (select the shortest attack and chase distance) and go to the nearest Wild Surge. Aggro them on yourself and let your Follower kill them all - except an Archer. Archers tend to kite so if you don’t chase them they are safe from your Follower. After all select a passive state for your Follower and chase this only survived Archer to knock him/her out. Here he/she is, your FIRST human Thrall on this island.