1. I'm also using constition for wizard and wits for my ranger. Mostly investing in 2 attributes of the strenght of that character if thats what you're meaning.

2. Yes so you're saying for example i could use 2 points or so in huntsman on my wizard to do more damage from above

3. by schools you mean the Skills section with Warfare en so on? So i can buy those skillbooks from other schools that sometimes require an 1 point investment into for example necromancer to use that skill.
I saw that ranger had the first aid ability but when i began playing it wasn't there so i have to buy that skill and equipe it in an memory slot?

Finally about those recipes. you're saying i can craft unique skills. Do i get those recipes just as for example knife-on-a-stick buy reading a book you got from a vendor or found in a chest? So far i only crafted a bow and some food and potions.

Sorry for my noobishness it is my first game in this series and this kind of rpg.

Really appreciate the good tips :D