Just my own idea... What do you really want? Be a Christian, or join a club?

It is hard to communicate a simple and clear concept of what I believe it is to be a Christian. 

Hard to induce people to grasp that such reality is about a person choosing to follow Jesus Christ to eternal resurrected life in Heaven...

Rather than Real ChristianityTM being a matter of paid-up membership (in good standing) of... whatever Christian-themed club church you have decided-upon, or were socialized-into.   

I was recently asked, in perfect sincerity: 

Is there a name, book, school, or prophet of what you are trying to express?

And when the penny began to drop: 

I see.Then it would be just your own idea. 

Just my own idea...

That's "just" says it all, in a nutshell. 

What it means to be a Christian is indeed just my own idea. 

Or, to put matters differently; I take personal responsibility for my fundamental beliefs and conduct.

If you want, instead, to join and obey the rules of a big club church religion based on a name, book, school, prophet, tradition, complex theology, international bureaucracy or whatever...

If, that is, you choose to hand-over responsibility for ultimate beliefs and conduct to some institution/ organization or another; there is every inducement to do so. 

Or you could instead "just" be a Christian, to the best of your discernment.