The Map for the first few Days. Do NOT meet Nauxus at the Swamp! We will meet the Bull Tribe first!
After the first Encounter with the Boss, talk to the People in the Tavern, Fullfill Chet's Quest to hunt down some slime. Once the Quest is done, Snow returns. Buy the pocketwatch, at least one healpotion and potentially beer and jerky. Don't go for Hakan Alcohol Quest now. We will defeat the Tree Monster much later without the help of Chet's Goo-Armor in oder to gain another 2 Lv-Points!
After the Second Bossbattle our HP is very low, isn't it? I recommend to buy stuff from Chet, Beer from Snow and Jerky from Witer until your purse is empty. After that, lose a bunch of fight against the slime to rise your corruption to 15. Or ignore that step and get handled by demons later.
Use the evening and the early night to collect sticks and stones in large numbers without getting disturbed by Ghosts. We will need them later. Upgrade your Sword whenever possible. the first Upgrade only needs Stones and Slime.