Note that none of your progress on the beta site will be transferred to the "real" site when the curriculum is officially updated. So I wouldn't worry about the lost progress. Also, only the challenges with an asterisk behind the name (on the map) are required for the certifications. I would recommend to save the solutions to those challenges somewhere locally.
I have been redoing the curriculum from 0
challenges and projects....
so far im still in the js certification (2nd)
I was really hoping that I could do more! like even get to backend!!!