There is 3 levels to every skill
Level 1: You know the basics.
Level 2: You know and can do more with the skill
Level 3: You're a master with the skill.
Athletics
Climbing
Driving
Cooking
Engineering
First Aid
Hunting
Fishing
Hand to Hand fighting
Knife fighting
Lock picking
Marksmanship
Outdoor Survival
Weapon Building
Building
Farming
Sneaking
Flying
You get 4 points to spend, so 4 level 1's. 1 level 3 and a level 1, as long as you only spend 4 points