How can you play zombies with random people at bo4?

How to Play Call of Duty black ops 4 zombies with random people squad

Please tell me how to do that, because I only see solo and I can't change that

Please give me an answer

I don't have a BO4 but I think you just go to a public game and then look for a game

I try that, yes, but I haven't found out why that doesn't work. You can also look at my new question because I need help