Leash Cats: Doable?

Our cat is just under a year now. We lived in a condo building on the 29th floor, so Jynx was barely ever outside. As she got older, she started getting a little more adventurous by laying on the balcony. We have recently moved to a house with a backyard and try to let her outside a little more often. It's only been a week since we moved and she is still very apprehensive  about the outdoors, but I hope to get her comfortable enough that we can take her on walks to the park nearby!