I see three dangerous types of people in the congregations that can lure you to express your doubts:
1) "weak one": You suppose somebody who is missing meetings and doing the absolute minimum will discuss your doubts freely. Mistake! When you confront him with the TTATT, he turns to be a hard core WTS apologist and report you to the elders.
2) "semi-doubter": person expressing various doubts for less important WTS dogmas - trumpets in Revelation, university education - or the person criticizing CO, DO, branch committee. You think "okay I am safe to come out in front of him". Again it is a mistake! When confronted with serious stuff ("deep truths") - wrong christology of WTS, God's name in the new testament, FDS/GB not being led by the Spirit - he looks like he caught you sharing child porn and he goes to the elders.
3) "I can explain everything": self-confident elder who says "come to me, express your doubts, I can explain it. I will give you arguments. Let's discuss the matter." He is so self-confident! He thinks he can destroy any argument against the WTS easily. In reality he expects something like
You: "Brother X, I do not understand the 1914 teaching."
Him: "OK, so let's think - who else is preaching worldwide in 236 lands? Who else has such a great webpage jw.org?"
You: "Oh yes!, thank you brother, now I do not have any doubts anymore"
But if you put really strong arguments on the table, he is upset and he will start to look for ways to DF you.
At the end it is almost impossible to find somebody in the congo to share your doubts...