Ong will have the support on course of her father, though her mum will be staying at home as her two sisters are preparing for school exams.
But there are still important decisions to be made, like who will caddy for her at Riviera, and other logistical issues to settle.
“We’re in the middle of our college season, so I’m trying to wrap my head around it [the US Open] and also prepare for other tournaments at the same time,” she said.
“You have to ground yourself because you can’t keep thinking about all these things when you’ve got another tournament, which you’ve got to play for your team.”
At the Open, however, she will be going solo and is relishing the challenge ahead.
She added: “This time I’m doing it just for me and just for the experience. There’s not really any pressure because I haven’t really got any massive expectation for myself.
“I’m just trying to have a good time and if I play great, then good and if I don’t, then I’ll move on to the next tournament knowing I’ve had an amazing experience playing in a major.
“I think this is going to be super fun. I just want to take as much out of this as possible.”