Golf was a major one for her. She entered a new world at Colorado's Roaring Fork Club in Basalt when she began caddying - and it took time to adjust.
"It was confusing for me," she says. "I was always trying to remember what I was supposed to do. I wasn't very confident." Eventually, she got the hang of it, and she learned to appreciate the game.
Caddying also presented her a life-changing opportuntiy - the chance to attend college for free on an Evans Scholarship.
The second youngest of nine in her family, Estefania knew money was tight. But she always dreamed of going to college. "As a little girl, I always saw myself with a business suit and a suitcase," she says.
She was awarded the Scholarship to the University of Colorado in Boulder last fall. And school, she soon discovered, was her next big challenge.
"It's hard living with people from all different backgrounds," she says. "There were times I felt out of place." That, too, changed with time. "I really fee like we're a family now," she says.
Estefania's confidence only continues to grow - and she knows caddying has helped her immensely. "It made me come out of my comfort zone," she says, "just because I did something most Latina girls don't do."
Her experiences have taught her a valuable lesson: "I really can," she says, "do anything I want to do."