5/3/1 isn't really that hard to calculate, and I'd recommend buying the book even if you don't plan to run any variation of the program. The principles espoused by Wendler will serve you well no matter what you end up doing.
I'm a big advocate of beginning lifters (especially grown-ups with busy lives) simply finding a way to lift that resonates with them and fits into their life. Learn the movements and get yourself hooked on the process first and foremost. Just racking up some time under the bar will put you in a much better position to sort this out on your own, even if it is time spent doing something less-than-optimal.
If you find yourself committing to this for the long haul you may want to find a way to lift on a better schedule and with more structure. For now you are a novice lifter desk jockey in generally good health, so just about anything sensible will work if you do.
If I were in your position I would probably do something like this:
Monday: Squat + lower body assistance (ex: leg press, stiff leg DL, Romanian DL, leg machine work, lunges)
Tuesday: Bench + upper body assistance (ex: chins, dips, rows, curls, shoulder raises, facepulls)
Thursday: Deadlift, Strict Press, assistance
Whatever you do, enjoy your time as a beginner under the bar!