How old are you? First, right in their own bible, jesus was 30 at baptism and was in it all his life, and was supposed to be the exemplar. Follow that example in the age--if you are not yet 30, you are not ready. If they hound, tell them that it says so right in their own bible, and that if you get baptized at under 30, you are not following this.
Another is, is the whole bible full of lies intended to enslave the whole planet? If you do not understand the bible without bias (and that means, if it turns out to be a negative book designed to enslave the whole world, you will accept it and not automatically get defensive for it), you are not qualified to get baptized. Do you understand why so much of the bible is centered around Israel instead of more global based? Are you ready to face facts that are politically offensive without automatically brushing them off? If not, you are not ready for baptism.
And how well do they actually follow their own bible? If you do not understand that, if they claim so proudly to follow the bible, they are bound to it for as long as they keep that claim, you are not ready for baptism. And, if they don't actually follow it, you need to look elsewhere or reject the whole bible yourself (in which case, you should never be baptized at all).