When I became a Christian, I had the idea that it was necessary to be a member of some specific church or another: that the Christian life is a church life: that a Christian's job is to be obedient to the True Church.
In other words, the institution came first, and it was my job (as a Christian) to be guided by that external authority.
The burning question was which church I ought to join. And that I could not decide; because in every direction I turned, the further I went, I more I got a strong and increasing feeling that it was not for me; that it was wrong for m; often that it was actively-harmful to my Christian life.
So, in the end, my main decision was a matter of whether (or not) to over-ride my intuition not to put myself under the authority of a specific church.
I eventually decided that this negative intuition was probably a divine guidance; and I have continued to believe-so since (which is now more than five years). The implication is that I do not acknowledge the spiritual authority of any church or denomination; but instead regard some of them as sometimes helpful, but sometimes harmful, institutions.
Some specific churches provide valuable Christian resources of direct relevance to my condition; and one of these I support financially and in other small ways. None provide anything that is of specific relevance to my normal Christian living; so I do not attend any church regularly, or engage with any socially.
Of course, I have no idea how other people's deepest intuitions are prompting them - and my own intuitive guidance may change at some point in the future; but the above describes the process by which I reached my current situation.
The only consistent advice I could give would be that there is no deeper validation that one's own strong and sustained intuitions about divine destiny as it applies to you, personally. That 'bottom line' conviction may lead you to subordinate your Christian life to an external authority; or it may not...