Yes, that's it.
Or, if you want to join the new yarn at the sleeve end, you can k18, bo10, & continue working the far side with that yarn. Then join the new yarn at the beginning of that same row, so the join is at a sleeve seam and easily worked in invisibly in the seam. Since the neck is so prominent & joins can show a bit, this can be preferrable.
KnittingHelp Queen Bee
"There is a vitality, a life force, an energy, a quickening that is translated through you into action, and because there is only one of you in all of time, this expression is unique. And if you block it, it will never exist through any other medium and it will be lost. The world will not have it. It is not your business to determine how good it is nor how valuable nor how it compares with other expressions. It is your business to keep it yours clearly and directly, to keep the channel open. You do not even have to believe in yourself or your work. You have to keep yourself open and aware to the urges that motivate you. Keep the channel open."
— Martha Graham