When Keeping up with the Kardashians
premiered nine seasons ago in 2007, only one member of the family was truly a household name: Bruce Jenner.
Since then, the show has made stars of the entire Kardashian clan. But in the wake of his October separation
from wife Kris, the 64-year-old Jenner is now leading a very different life and spending less time in front of cameras.
Having changed his look
and moved to Malibu, "Bruce just wants to chill out, play golf and enjoy his life more low-key," says a production source on the show.
A fixture at the Sherwood Country Club in Thousand Oaks, Calif., the 1976 Olympic gold medalist – whose net worth is an estimated $100 million – often hits the links or indulges in another favorite hobby: flying his beloved remote-control helicopters.
"Malibu is so Bruce," Pam Behan, who worked as a nanny for the family in the early '90s, tells PEOPLE. "He's a very laid-back, outdoorsy person and I'm so happy for him. It's like good ol' Bruce is back and he's actually doing the things he enjoys."
Although Kris says he's still filming the Kardashians' reality show
, sources tell PEOPLE Bruce's priorities these days include reconnecting with his children from his first two marriages: Cassandra
, 33, and Burt, 35, with first wife Chrystie, and Brandon, 32, and Brody, 30, with second wife Linda Thompson.
In the past, "He's had a complicated relationship with his boys and he's really working on repairing that," says a Jenner source. "They're supportive of him."
Adds a close family friend: "He truly is a much more private person than people think. He's trying to be a good dad who enjoys all the little things in life."
Reporting by JENNIFER GARCIA, PERNILLA CEDENHEIM and MELODY CHIUFor much more on Bruce Jenner's new life and look, pick up this week's issue of PEOPLE