Hi, I'm new with this so please bear with me... couldn't really find an answer online so let me ask the forum please: I'm wondering if it's possible to invite random players into my campaign missions. Whenever I'm going into the lobby it appears I'm joining someone else's mission; since I'm new at this I don't want to ruin someone else's game , I'd just like some other player to help me in some of my missions. Is this possible?

thanks!