please help me understand this report that mueller is supposed to come out with soon [View all]

I was just reading an article the other day that was talking about the fact that there is 17 different investigations going on with regards to Trump....
Maybe all of them are not led by Mueller, I don't know but he probably has more than one..... I'm guessing....
There's obstruction and there's Russian collusion at least.....

So when we get this report it may just be on the obstruction...
. Or am I reading that wrong? It seems like a lot of these indictments have been obstruction related..... Lying, witness tampering Etc
.
So what if we get an obstruction report first and not the Russia report?

Forgive me if I'm missing something obvious I just don't understand all this stuff LOL