Specifically
This goal is too vague to be measurable. Specifically (for now), I want to adapt and master a system for remembering and recalling numbers and dates.
If you are into mastering a memory system, phenomenal memory is my best recommendation. It’s the only one wich provides you a training program where you can start as a novice and get a memory worthy of a memory champion in a few months. No other course incorporates such a methodology, they just give you the techniques and leave you with it.