The way it works
1. jw introduce an idea to a person that makes one become interested in it (usually eternal life)
2. one studies with a witness from one of their books using it primarily and backing their idea using the bible(doesn't matter if it's out of context)
3. the student learns he needs to serve Jehovah (bible God) to survive the imminent destruction of the world, and to do this, he will need to be regular at all the meetings, sign up to the ministry school and give talks (what your friend is doing at the moment) and then he has to go door to door preaching
4. after doing all of the above the person is ready for baptism
After baptism, he's in the wts world, and those outside become associates, that's right, you no longer are will be his friend but an associate, a bad association at that. You may have good qualities but you will not help him make it into the new system, only JW are true friends and only ones who will help him make it. You may start seeing less and less of him. The first short while, new recruits usually become hollier than thou which also means they may speak the truth that actually embarrasses most witnesses because the truth is they belief crazy shit and they usually don't say this to outsiders but new recruiters are all hyped up and speak without realizing what they're saying, like - "if you don't become a jw you will die."
One good thing you have going for you, is that he's not a born in and he hopefully had a chance to develop a critical thinking but at the moment he fell for the carrot and isn't thinking straight. You may be able to get to him, but may be difficult as he's in lala land and thinks the end is oh so near. Everything around is a sign that they are in the last days......
What you may want to do is, find a topic you want to talk about. A good one is that Jesus returned in 1914. As him to explain it, and write info down as he's telling you this so he assumes you're impressed or are interested. Make sure he explains to you how they came up with 1914 and who came up with it first. Ask him does 1914 mean anything else to JWs other than Jesus' invisible return?
1914 at present means 4 events have taken place
- Jesus returned invisibly
- Jesus enthroned as king in heaven
- Last days began
- gentile times have ended
He may or he may not list them all, but he should explain to you the date was calculated on the basis of 607BC, because Jerusalem's temple was destroyed by Babylonians and then they apply 7 times...blah..blah..blah.. you get 1914. He might
Sounds good, you're impressed and you will check things out and get back to him with what you think. When you get back to him, you should have info disproving all he told you from their own publications and from archeological evidence. We can help you with this if that's the route you decide to approach him.
Again, this may help to wake him up, or not. If his mind is set on becoming a witnesses and will ignore everything you throw at him, there isn't much you can do. What he was probably told already is that because he's associating with the only true Christians others will slander them and will lie about them. In fact they say that Satan will test him by others who will speak against his new found belief and that's one of the signs that Satan uses weaken his faith.
This is what you're going against when you try to reason with someone who is under their "spell." To witnesses, exJW are all liars who misquote, speak half truths and twist their version of the truth. Since he's been studying with them for a while, he's heard this same shit over and over so you have to be careful how you approach his belief system and how you present the facts to him.
One thing, the above is general description of a new convert, he may be totally open minded and willing to listen to reason and get the hell out of there. He may not thought of distrusting them from the start and that may have been the reason for him not to do a research on them so it should be fairly easy to show him the reality BUT these are exceptions regarding progressive studies.
Hope this helps.