Brooks Koepka's new wife, Jena Sims, is taking a shot at her lifelong dream ... by throwing her hat in the ring to be a Sports Illustrated Swimsuit rookie.
The 33-year-old former "Attack of the 50 Foot Cheerleader" star-turned-model announced her goal in a TikTok this week ... saying she's a "firm believer in going after what you want."
Sims notes her mindset helped her get her now-husband's attention by sliding into his DMs .