Planning our first Interrail trip commencing on 28 June 2024 for two weeks.  Initially we were looking at the 7 days within a month pass for €317 for a senior but have noticed that the promo 10 days within two months at €285 seems better value. 
 

This pass needs to be activated before 1 June 2024.  My question to more experienced travellers is that I am assuming that we can activate towards the end of May and then use it for our trip a month or so later.  I am also assuming that we can activate the pass without using it on a travel day.

It would be good to get reassurance that the above plan would work before pressing the button to buy the  pass.