There will be a point cost system for skills.
All skills start at a 10 which gives a +0 to your rolls
You start with 20 Points to spend amongst all skills so choose wisely.
You cannot buy a skill score of 20 you have to earn your way to 20. The highest you can buy up to is 18
Here's a table of what each point costs or gives:
7: -2 to your rolls +4 to your points
8: -1 to your rolls +2 to your points
9: -1 to your rolls +1 to your points
10: +0 to both rolls and points
11: +0 to your rolls -1 to your points
12: +1 to your rolls -2 to your points
13: +1 to your rolls -3 to your points
14: +2 to your rolls -5 to your points
15: +2 to your rolls -7 to your points
16: +3 to your rolls -10 to your points
17: +3 to your rolls -13 to your points
18: +4 to your rolls -17 to your points
19: +4 to your rolls. Can't be bought
20: +5 to your rolls. Can't be bought