In the Christian Greek Scriptures their are over 30 times where it says that christians are to be witnesses of/for/or about Jesus and not one that instructs christians to bear witness about Jehovah ,you could ask humbly ,why is that so ?
You are also aware that the Christian Greek Scriptures say that the name of Jesus is to be exalted above every other name , either in heaven on ,earth ,or under the earth. (that includes jehovah)
However I do agree with what others have said here play it down act dumb and be submissive until your a bit older .
If the Elder senses you are questioning the GB al he will want to do is entrap you into committing yourself.
Take care.CoE