I have made many wine and beer wine starters for yeast in the past..
With no problems.

I read that I was supposed to use juice of some sort.. which I didn't
have.

I took some of my ferementing Merlot in my 2000ml flask. Added some
sugar and boiled to sanitize it.

I let it cool, I forgot about it so it went down to 50°F in the
fridge.
Warmed it back to room temp, and added a pack of 3-X culture.

It is now on the second day, shouldn't I see something? There is no
action in the airlock.