Nearly lost Riff.

I'm trying to introduce her to the outside world.
I carry her in my arms and walk her around the courtyard.
She wriggles and squirms and breathes heavily, whimpers and cries. Not in excitement or joy. To go back inside.
This evening she damn near got away from me; she's a strong girl! She struggled out of my arms and I almost didn't catch her.
Tips on how to make the transition to being an outdoor cat as well as indoor??