9 month old Cats (SCIO)

I have 2 all black cats there brothers.
1 short haired and 1 medium long haired.
They are 9 months old.
Not used to being handled as in picking them up but they are friendly.
They use the doggy door so they are in and out of the house anytime they want.
They were wormed as kittens and had vaccines from Tractor supply as kittens also.
Would like them to go together.
They are not neutered.