Here's just a little ammo you can use:
1 John 2:19 (NWT) -- They went out from us, but they were not of our sort; for if they had been of our sort, they would have remained with us. But [they went out] that it might be shown up that not all are of our sort.
1 Tim. 2:3-6 (NWT) -- This is fine and acceptable in the sight of our Savior, God, 4 whose will is that all sorts of men should be saved and come to an accurate knowledge of truth. 5 For there is one God, and one mediator between God and men, a man, Christ Jesus, 6 who gave himself a corresponding ransom for all"
Thus, you may not be of the JW "sort", but that doesn't mean it isn't "God's Will" for you to be saved.
Romans 10:9 (NIV) -- If you declare with your mouth, “Jesus is Lord,” and believe in your heart that God raised him from the dead, you will be saved. (JWs demand more of you to gain salvation. IOW, they ADD other requirements to what is said in God's Word.)
Assuming your lifestyle would not qualify you for any of the naughty things mentioned, you could use:
1 Cor. 6:9-11 (NWT) -- What! Do YOU not know that unrighteous persons will not inherit God’s kingdom? Do not be misled. Neither fornicators, nor idolaters, nor adulterers, nor men kept for unnatural purposes, nor men who lie with men, 10 nor thieves, nor greedy persons, nor drunkards, nor revilers, nor extortioners will inherit God’s kingdom. 11 And yet that is what some of YOU were. But YOU have been washed clean, but YOU have been sanctified, but YOU have been declared righteous in the name of our Lord Jesus Christ and with the spirit of our God"
Where does it say you must attend meeting, go in field service, etc etc