After revealing their engagement, the couple decided to enjoy a quiet evening barbecuing at home on Tuesday.
Kardashian, 29, took to Snapchat to document their dinner and how his model/business owner fiancée was teaching him how to grill.
"Teaching Rob how to grill – there you go, baby," Chyna, 27, said in one video while her beau flipped a huge spread of burger patties and sausage links.
"I ain't cooked a day in my life!" Kardashian responded.
"It's good, you're doing good," she assured him sweetly in another video.
"You know, we grillin' over here, 4th of July, with our families," Kardashian joked at one point while Chyna laughed.
The happy couple got engaged Monday night 10 weeks after going public with their relationship.
They spent the night celebrating with friends and Chyna's mother at Ace of Diamonds strip club, where Chyna had a scheduled work appearance.
A representative for Chyna told PEOPLE the star, née Angela White, can't wait to be "Angela Kardashian."
"She was more than excited, she was thrilled, just super happy," said the rep.
Since revealing their engagement, both Kardashian and Chyna have been proudly showing off the 7-carat sparkler on social media, with Chyna sharing close-up videos of the rock and Kardashian posting a sultry picture of Chyna holding her hand up to her mouth to show off the ring.
Kardashian's family, meanwhile, has stayed mum on social media.
"No one is jumping up and down with excitement today," a source told PEOPLE of the Kardashian-Jenner clan, currently on a ski trip in Vail, Colorado. "They have made a united decision as a family to not comment on social media yet about Rob's engagement. The news is not shocking, and not totally unexpected."
While Chyna has undeniably sparked a positive change in Kardashian, pulling him out of his formerly reclusive lifestyle, the family fears she is "manipulating the situation," said the source.
"Blac Chyna has been great as kind of a rebound. As someone that got Rob out of a dark place, that helped him get motivated and healthy again. Let's just be honest, no one is really hoping for a marriage to happen," explained the insider.