People say go all-in when you're young because it gets harder when you're older. I just wanted to mention that this is true and it happened to me and many of my friends. I'm so glad I went all-in when I was younger to establish my career and get wealthy because nowadays with a family it's much harder.. this let me focus on my family rather than work.
I think one of the most important thing you could do is get a great network and surround yourself with amazing people. What's hot in the moment changes every few years, but great connections stay for a long time. Also, being close to amazing people that are very talented means that you'll get to see new trends coming and always be on top of it.