After going through the first tutorials in Last Oasis and learning how to craft weapons, water, and your first walker, you'll be tasked with the Survival of the Fittest mission. It's pretty much kicked off at the deep end, as you go through the tutorial trying to do something that involves a lot of combat, travel, and getting hit by monkeys.
For the Survival of the Fittest mission, you must kill ten Rupus and loot five Rupu Urns. Killing the Rupus is pretty easy and won't be a problem. Surviving long enough to find five Rupu urns may be a bigger problem.
The first thing you need to do is find Rupu camps. If you open your map using the M button, you will see red exclamation marks on the map.
These are Rupu camps, but they are quite dangerous, especially if you are alone. Head to one of the camps, then look for tall buildings on stilts. These strange huts are where the Rupus keep their ballot boxes.
You can use your grappling hook to climb up to the roof so you can get in and loot the ballot boxes, but there will likely be a lot of Rupus around, and some of them can be quite dangerous.
There's also another issue as these urns are a hot item for players, and there's a good chance they've already been looted. They take a while to reappear, so if you're having trouble finding them on your server, it might be a good idea to head to the edge of the map and try a different one.
You will need your Walker, plenty of water, a few weapons, and plenty of bandages for this quest. Go to the camp, then find the huts. Try to take out as many Rupus as possible in single player combat, unless you have friends with you. Grab the roof, then jump into the hole you will find there and collect the urn.
Make sure you take the time to heal between fights and always grab some resources.