You did but that's ok. It's actually more like this, you pop it up and there is already another player on first base (a super critical point I completely omitted)

If there were not an infield fly rule, I as the defending team would let the easy pop fly catch drop, failing to secure the out.

This forces the player on first to run for second, and the batter to run to first.

I pick up the ball in front of me and throw to 2nd for a force out, then to first for a second force out aka a double play.

The opportunity for the double play shouldn't exist because I should have caught the batter out