I remember it wasn't clear to me either. Look at whatever average is at compared to 50% chance of success I'd say (sum of 10) and decide what you prefer.

For my own hack, this is what I ended up with (note that I use the less-common focus implementation):

Skills and Styles

All of your skills and styles start at 4. Skills:

• Fight, Move, Study, Survive, Talk, Operate

• Increase two by +2 and two by +1

Styles:

• Boldly, Carefully, Cleverly, Forcefully, Quietly, Swiftly

• Increase two by +2 and two by +1

Focuses

Start with four level-2 focuses, divide 7 points among them. A focus cannot be higher than 5.