Yeah, I’ve got a book titled “How To Stay Alive In The Woods” IRL that has drawings and walkthroughs for making shelters. (Sticks and evergreen branches, mostly, though there’s snow-building guidance. Can make a tent from skins, and it’s not like the wolves & bears are in short supply, either. Want me to dig it out?) One should be able to build a roof over one’s head w/o needing nails.
Unless they fixed NPCs and their inability to have fine location data* in one of the new versions, if you want martial arts you may as well spot yourself the three points and take Martial Arts Training. Taekwondo seems to work OK but I’ve ground it up to 6 and never swept anyone. (Sweeps theoretically become available at level 5, according to the previous wiki.)
*DEBUG: Static NPC with no fine location data! Teleporting it off to goodness knows where!
I’m still using the 02 Feb version and (after a mad Cooking spree: 5 Royal Jellies, 2 Cracks, 2 Fruit Pies, 4 Teas, a Bread, some Cooked Meat and about 10 Clean Waters) ground up to 8 Cooking from 7. Dunno what happened to Siferous but Mutagen lit right up–though it’s apparently high enough level that failures actually happen. (IME, recipes below 3-4 virtually never fail; 5-6 failed rarely, and 8 seemed to fail more often than it succeeded. All references are at their corresponding skill level or one point above.) Hoping someone didn’t disable Mutagen-making as that & Purifier are the biggest reason to take high-level Cooking. (All the food, & royal jelly, come through at 5-6. Anything higher is drugs.)