I am certain this has been brought up many times before.
According to John 6...
44 No man can come to me unless the Father, who sent me, draws him,+ and I will resurrect him on the last day.+ 45 It is written in the Prophets: ‘They will all be taught by Jehovah.+ Everyone who has listened to the Father and has learned comes to me. 46 Not that any man has seen the Father,+ except the one who is from God; this one has seen the Father.+ 47 Most truly I say to you, whoever believes has everlasting life.+
The word translated "believe" in verse 47 is πιστεύων
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47 ἀμὴν Amen ἀμὴν amen λέγω I am saying ὑμῖν, to YOU, ὁ the (one) πιστεύων believing ἔχει is having ζωὴν life αἰώνιον. everlasting.
Yet the NWT translates the same word differently on a much more famous scripture which we all know...
16 “For God loved the world so much that he gave his only-begotten Son,+ so that everyone exercising faith in him might not be destroyed but have everlasting life.+
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16 Οὕτως Thus γὰρ for ἠγάπησεν loved ὁ the θεὸς God τὸν the κόσμον world ὥστε as-and τὸν the υἱὸν Son τὸν the μονογενῆ only-begotten ἔδωκεν, he gave, ἵνα in order that πᾶς everyone ὁ the πιστεύων believing εἰς into αὐτὸν him μὴ not ἀπόληται might be destroyed ἀλλὰ but ἔχῃ may have ζωὴν life αἰώνιον. everlasting.
Faith and believing are not the same thing and it's not even what they're own interlinear says!
I am no student of Greek but the scriptures seem to be pretty clear.
Whoever believes is eligible for everlasting life.