What (or where) is Kingdom of God becomes pretty clear once you enter it :P

https://senderspike.medium.com/gospel-revealed-694ee46882e

https://medium.com/@senderspike/one-way-68601ea7a5d2

And yes, you are correct -- not even Jesus' direct followers (apostles) had a clue:

https://senderspike.medium.com/why-jesus-never-had-actual-followers-21c901810e1a