Hi, Knight 40, welcome to the forum.
There is a sense in which you are right on both counts. The first mention of Antichrist is at 1Jo 2:18 and it is interesting to note that here, at this text, which provides the norm for the doctrine, we have TWO, not just one, contextual reference.
Jo tells is readers "You heard AN Antichrist is COMING" [The anarthrous noun may be a name, hence Antichrist without the "an"] but note
1 The singular, 2 The singular is in some way FUTURE 3 One of the things that we DONT know is where his readers had "heard" of the coming of this individual. Several commentators have speculated that they might have heard sermons preached on the subject by several evangelists, like the Apostle Paul, or even Apollos
But Jo also said: "So also NOW there are many antichrists"
These were already at work, evidently undermining the Christian heritage in the various churches.
From the above we can gather that John seems to anticipate an individual [who he did not identify] who is specifically a person who would assume the identity of a notorious opponent of Jesus Christ. Whatever this person would do in the unspecified future, was already being done in a more limited way by a collective group of opponents to the Faith.
It is interesting to see what the WTS has done with this teaching. In the "[human] Reasoning" book, pg 32 rather than taking BOTH usages of the word "Antichrist" equally literally, they have chosen to accept only the latter part as literal, ie that "Antichrist" is a collective group. The first usage is now applied symbolically: The individual "antichrist" is actually also a collective group, an "Antichrist Class" Evidently anyone, who like us, actively oppose the WTS
Makes ya proud to be part of a prophecy huh? You and us were included in the "coming" AC.
Maybe, John's readers had heard a sermon preached by Paul that went something like this: "In the 21st Cent there is gunna be these apostates who will oppose the GB on summat called the innernet yep, thems the coming AC"
Cheers