# Counties outside your primary duchy, non-culture/religion counties
If you are lucky then some of these auto-created vassals will fill a slot or two of your council. Probably not, either way it's time to do probably the most tedious work which is to fill your council with some talent. This will become much, much easier later on when claims are a dime a dozen as claims will help a ton in getting random courtiers to come work for you. Initially, however, you are completely at the mercy of the RNG. Open up the character finder, men/my religion/not ruler(doesn't work as of 1.06 but hopefully will some day)/unmarried (helps in finding younger/unattached courtiers). Sort by the stat you want, work your way down.
What you need to be able to invite a random courtier is for them to be at least -1 with their liege (preferably more), and at least 50+ with you. The actual number you must hit are roughly their opinion of you - 75 (no reason to move, base reluctance for all diplomacy, other) > their opinion of liege. It is ridiculously difficult early on to invite someone who hates their liege and loves you and have them accept, and it is one of my pet peeves with this game. Later on the 'unable to press my claims' modifier will make it a ton easier to find people to invite but right now you are out of luck.