People make grand overtures about a language they want to learn, a skill they want to acquire, a body composition goal. They think about where it’ll fit in their week. They’ll picture it. Five years later, no new language, no new skill, no beneficial body composition change.
Gurus tell us memorization right before bed is best. They tell us exercise upon waking is best. Some say exercise in mid morning to afternoon is best based on certain circadian rhythms. If the skill is a sport, obviously when the court or field is available is best. If it’s an instrument, when you have an ample set of free time is best.
How about WHENEVER IT WILL HAPPEN? Philosophers can debate all sorts of theoretical times. But again, five years later, nothing new for most. Ten years later, nothing new. so what’s practical?
And I can tell you from repeated experience observing tens of thousands of gym members and clients, getting additional “free time” doesn’t make it any more likely. In most cases, the more free time someone has, the more they waste. I’ve seen it with retirees, the independently wealthy, trust fund babies, people on sabbatical.
Just find a toe hold. Any old one will do. And put your toe in.
When is best to train? Whenever you will. And never where you won’t.