My guide to being a badass adventurer:
Stats: Raise Strength, Endurance, Agility, Willpower, Kinesthetic Sense, and Spatial Sense by two levels. Raise Intuition, Endurance, and Focus by one level.
Skills: Bring Observer to up to Great, Swimming op to Adequate, Reading to Novice, and pour the remaining skill points into Armor User.
Now, go to the nearest fortress and loot at least boots, a shield, gauntlets, a helm, and a cloak. You may need to loot multiple keeps to find what you need. Grab around fifty berries from some peasant's house as well. Now, go to the beach and find a horseshoe crab. Press Shift C, and change your attack prefferences to Close Combat, Stand Ground, and Stand Ground. Sneak up on the horseshoe crab, then lie down next to it (if it hasn't detected you, reveal yourself to it). Now press Alt R to start recording a macro. Mash the . key until your hand starts to hurt, then press Alt R again. You may be slightly bruised from the horseshoe crab pushing you, but the armor you got from the fortresses will keep your ears, finger and toenails from being smashed (unhealable wounds which will get infected and kill you) Now press Alt P to run the macro. Keep doing this, pausing occasionally to eat and drink. If your waterskin gets empty, bathe in the ocean and drink the water covering your clothes. When it starts to get dark, make sure you are on sand and go to sleep (bogeymen won't attack you when you are on the beach). When you wake up, find another horseshoe crab and repeat.
By the time you've run out of berries, you should be Legendary in Armor user, Shield User, Fighter, and Dodger, as well as Superhuman in all the stats we boosted during character creation. Now go find the weapon you want to use and begin your adventure as a nigh-unkillable being of deity-level power.
Be warned: Do not attempt to train using regular crabs. They will sever nerves and tendons and just generally screw you over. If anything does attack you on the beach, strangle it until it passes out and kick its skull in.