I think some additional specifications need to be said:
You do not ask or apply to become a helper, you are nominated by the staff. Helpers get similar commands to moderators but are under them in the "hierarchy".
To become a helper, you must show dedication and contribute a lot of help to Minetown. Since the rank has been given, the staff have been constantly bugged with questions on how to become a helper... The "qualities" of a person who is likely to be nominated, if I can say, are; being active ingame and on the forums, contribute on the wiki, help solving problems ingame and on the forums, do not get involved in problems, do not bug the staff, show maturity.
Some people contacted the staff saying "I always help people ingame, why am I not a helper ?" ... Being helper goes beyond than that. Yes helping other players ingame is part of the role, but it is not the only requirement.
I hope this can help clear the situation around the helper rank.
And... if you had to be told to come look at this thread instead of finding it on your own... you are probably not meeting the criteria to become a helper.
Cya