How do you edit leagues so they work in game?

Ill just give you a quick step by step mate.

The first thing to do , is create the competition, i guess you've done this, but incase you haven't
Competitions:
Add
Select nation as scotland, and domestic division, reputation etc
Add the teams you want.

Alternatively, just use the SPL and add the teams you want.

After this you need to select 'Add nation rules'
Then Create new nation rules
Add the league you created
Set the settings 'rounds'

After this the details are on the toolbar below the left, just work your way down the list (Transfer windows, etc)
 
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