A couple of corrections: Conspiracy does not require collusion. You don't even have to know the other person or people! You just have to be working toward the same illegal goal. I think this is decided law right up to the Supreme Court.
Lying to the press is not illegal under most circumstances. But when there is an active investigation, lying to the press about something that could affect the investigation IS Obstruction of Justice. Just like lying to another person is usually not illegal, but do it to influence a potential witness and it is Witness Tampering (which Manafort found out the hard way.)
There is a very good reason why lawyers first of all tell their clients to stop talking. Anything you say will probably hurt your case and almost certainly not help.
Number One Rule: When you find yourself in a hole, stop digging.