Ask HN: Which jobs prepare best to build a patio11 lifestyle-business one day?

I am a recent college grad in computer science; I can hack something together using Python and recently I started playing around with Meteor.js. Yet, I lack reasonable real-world programming experience.

I want to acquire skills that will enable me to build a SaaS one day. Nothing big, more a patio11 bingo card creator thingy.

Two questions:

(1) Should I look for something like "Full stack engineer trainee"?

(2) Should I look for startups, SMBs or even corporations?