I suggest reading Feynman's letter to a former student about "worthwhile problems". As someone older than you, take it from me that at 23 you have a world of t

I suggest reading Feynman's letter to a former student about "worthwhile problems". As someone older than you, take it from me that at 23 you have a world of time and options available to you. Many of my pursuits and interests started at that age.