Be around for a while, behave like a good Pinsider (contribute, post, discuss) and you'll to go from apprentice to member in no time!
In the meantime, if you would like to make changes to location entries you can PM a moderator. I'll add a note about this on the edit screen for future apprentice users (new users) who would like to submit changes. By the way, these limits are implemented to avoid abuse from newly created accounts.