no, you have to activate it latest in April 2023 (I suppose 9th April, but maybe one of the date experts can clarify that) and then it will be valid for 3 months.
The pass has to be activated latest 11 months after purchasing. 

The latest possible start date is exactly 11 months after purchase, so in this case 10 April 2023. The last day in the validity period will then be 9 July.

The latest possible day to do the activation is also exactly 11 months after purchase.