-
Look at the Quick Start Guide on the Challenges home page. This is your road map that I think @Loraine is talking about.
I would suggest to do the current daily challenges and not try to (pick up where you left off). There isn’t a sequence in the yearly calendar, everything comes back around. Also the comments under the daily challenges are both fun and often useful and you would be partially missing out on these, because the comments would be dated instead of same day or hour.
Also there is no need to complete all challenges in a given week or even all measures of a daily challenge. It’s your path and just do enough that you are challenged for as long as it is fun. Next time you will most likely be able to do more.