I want to try some coop achievements i'm new

[KirEEriK21]

Can anyone help me? I just hooked up to the internet and haven't had any luck joining a random co-op game. my gt is KirEEriK21 I don't know how it really works yet

 

[RSVR85]

I'll add you and have a quick shot with you.

 

[KirEEriK21]

Can we do the demon door achievement also?