Eyesight gets fuzzy in middle age, but not hindsight. Hindsight progresses over time from 20/20 to 20/15, maybe even to a fighter-pilot-like 20/10. Learning from experience is good, but what's also clear is that hindsight is like a wine bottle with just enough contents to fill your glass one-quarter of the way; you get to taste the wine, you just can't relish it or make it last.
Hindsight lets you see a course of action that might've brought about a better end, you just can't enjoy the result.
Leave hindsight to sports-radio talk-show hosts.
The best course of action to take in a given situation isn't always clear. In fact, sometimes it seems like there isn't a "best" option (even after weighing all of your options). Humbly trust in who you are. Think and act with integrity. Be human, and understand that the right course of action may also be the most difficult course to tread. Life is messy that way, it tests character that way.
Make your choice, move forward, look back only long enough to learn what could've been done with more calm, more peace, more kindness, more love.