Moving fast doesn’t have to come at the expense of quality or long term progress.
Make small moves and correct mistakes quickly.
Avoid irreversible decisions, so when you change your mind, you don’t have to start from scratch.
The quicker you learn and adapt to reality, the better.
Check your ego and listen to feedback. But you only get that feedback if you put yourself out there. Thinking about doing something while you are in the shower is different from being out there in the dirt.
When you are starting out, act as a field mouse foraging for food while the owl is hunting. Stay alert, be nimble, and use your size and speed to your advantage. Stack up the small wins and then take cover. Repeat and build momentum over time: the more forward momentum you have, the more significant the outcomes.