"We're putting a lot of pressure on ourselves to make it perfect, which definitely has led to things being delayed a little bit more than we expected," Jason told People in a joint interview with his fiancee.
Kaitlyn, who starred on The Bachelorette's eleventh season, and Jason, who competed on the show's fourteenth edition, got engaged in May 2021 after two years of dating, and Jason predicted last month their wedding is going to take place in early 2023.
Kaitlyn, however, still has her sights set on a Fall 2022 wedding in Nashville, TN -- where the couple currently lives -- if she and Jason can get everything together by then.
"We haven't scratched the surface of what we would get into with wedding planning," Kaitlyn, 36, admitted to the magazine.
Jason, 33, shared how the pair has already hired a wedding planner but they still need to book a venue for their nuptials.
"I want to go big on food, the venue, the whole experience," Kaitlyn shared. "I want people to walk in and be like, 'Oh my gosh, this is unlike any other wedding we've been to.' I want a champagne fountain."
Kaitlyn said she'd like to serve her Spade & Sparrows wine at the wedding and invite some familiar faces from Bachelor Nation, namely Whitney Bischoff, whom Kaitlyn competed against on Chris Soules' edition of The Bachelor and is still "so close" with.
"And then because Kaitlyn is literally tied at the hip with these pros from Dancing with the Stars, some of them will be invited. That'll be a wild dance floor."
Kaitlyn -- who recently toured with the Dancing with the Stars cast after winning Season 29 with her pro partner Artem Chigvintsev -- even revealed how she'd like pro dancer Daniella Karagach, who won Season 30 of the show, "to choreograph our first dance."
But Jason admitted he's going to be a little shy on the dance floor, knowing he can't keep up with the pros.
"I watch Kaitlyn, but I won't dance in front of her," Jason confessed. "There was one time I went to the bar with every Dancing with the Stars pros and Kaitlyn, and I've never in my life felt so intimidated. So I just watch."
The pair also look forward to gathering both of their families in the same room given Jason's loved ones are from Buffalo, NY, and Kaitlyn's clan hails from Canada.
"Our families and friends are so spread apart between Western Canada and Eastern states, this will be the first and last time that all these people who made us are in one room," Jason said.
In the meantime, Kaitlyn is excited about her upcoming bachelorette party that will be held in Miami, FL.
"I used to not like Miami," Kaitlyn noted. "I used to think it was just full of douche canoes. But I don't have to go to the club scene and get bottle service. There's a lot of good restaurants there and beaches."
When Kaitlyn revealed her initial October 2022 wedding plans, she said she and Jason had decided on the guest count being "300 or less."
Kaitlyn, who co-hosted The Bachelorette's seventeenth and eighteenth seasons with Tayshia Adams, disclosed in June 2021 how she had been picturing a Great Gatsby-like, black-tie event -- very glam, which is so opposite of what I thought I would want."
"Because four years ago, I would have been like, 'I want bohemian. I want it farm-style.' I just keep changing my mind," she said.
Kaitlyn also added at the time how she and Jason envisioned their nuptials being "super-chic" with a reception that includes "a band, a deejay and a piano man," who will conduct a sing-a-long during the evening.
Kaitlyn also previously wanted Artem to choreograph her first dance with Jason as man and wife, although those plans have apparently changed as of recently.
Kaitlyn first met Jason while taping an episode of her "Off the Vine" podcast in October 2018, and he took her out on their first date in January 2019.
Jason -- who finished Becca Kufrin's The Bachelorette season in third place in 2018 -- moved from his place in Seattle, WA, to live with Kaitlyn in Nashville in June 2019. The couple has since adopted two dogs together.
Kaitlyn initially found fame when she appeared on The Bachelor's nineteenth season in 2015.