As far as the 'time' it takes to become a druid would it be based on a timeline much like the early days of wicca where you would study a year and a day? I am guessing that the two paths are so far away from one another that this would not be the case.
Some druid orders will have a year-and-a-day requirement for advancement between each rank. In the Reformed Druids of North America (RDNA) things are different. There are the three main ranks of First Order, Second Order, and Third Order, the Third being the first level of the RDNA priesthood. In the RDNA there's only a recommended guideline that you take at least a calendar year to ascend from the First Order to the priesthood, but you can take as much time as you need or longer.
This means it's in part a matter of personal integrity: when you personally feel you are prepared for advancement in the order, and feeling a genuine calling to serve the community. In addition, an existing member of the priesthood must assess your level of commitment and motives before you enter the Third Order. What you say and how you say it will be taken into consideration. All the more if you're perceived as trying to fast-track your way to ordination. I've heard one druid describe it as almost akin to having to defend a master's thesis, but not nearly as grueling.
Before I was ordained to the Third Order in 2013, I had a panel of five Thirds who cross-examined me to ascertain my preparedness for the priesthood. Then they held a private council and concluded that I was indeed prepared according to their judgements. They were the adjudicators prior to my ordination. In the RDNA we sometimes use the satiric misspelling "adruidicators."
