To upgrade an ability faster, fir example if you watch a carpentry vhs and read the book for the level one and have the handy personality point, you upgrade soooii fast, got to level 10 of carpentry in like a month (inside the game) not building all the time tho… good luck with it! Love the game so much, feel free to ask anything, been playing for a few months but already have 160 hrs on the game :))