Instead of joining the family business, I decided to strike out on my own.
strike out on (one's) own
To pursue something independently. Now that I can finally afford an apartment, I'm excited to strike out on my own.The singer in that band is so talented that I'm not surprised she wants to strike out on her own.
strike out on one's own
and set out on one's own
to start out to live, work, or travel by oneself. I couldn't get along with my business partner, so I decided to strike out on my own.