Make lots of small bets instead of one huge one. Small losses teach; big losses end the game.

A single large commitment gives you one result and almost no information. Several small ones give you a set of outcomes you can learn from, and none of them can put you out of the game. That is the real argument for keeping bets small, not caution for its own sake but staying in long enough to get good.

Before you put everything into one thing, ask what the smallest honest version of it looks like. Run that first. If it fails you will know something specific and still have what you need to try the better version.