Where to find new guns

so I just downloaded dead frontier 2 and I’m trying to kill the root-tentacle zombie but my gun sucks and the root guy keeps killing me before I can kill him. Do I just suck at this game or is it the gun, where do I find a good gun at the very beginning of the game, can I like trade or buy one from an npc or do I have to just explore a lot?

also where do I get more bandages, it says something about a trader but I have no idea where he is and I can’t heal like I’m stuck at half health all the time.