I think if one cylinder has no compression and you are then running on just 3, it would be vibratingly obvious.
For me, to take it to a pro.The trick is
Looks to me like a job I was thinking diy, then it turned into omg.Here is a picture of a kit I got today for a 1.6 (the OCV gasket I mentioned is for the 1.6 not your 2.0)