RDR Undead Nightmare tips for beginners

I started my new game RDR Undead Nightmare and its challenging games as compare to the base game. Do you guys have any tips aside running and replying on the torch or climbing ?. What’s your tip for stocking up on ammo and generally staying alive?

The game is kind of tough, I have seen a gamer get stock ona level for almost 3 to 4 days. Try YouTube gamers community, they can give you a hint or two.