Transitioning twins to beds

I'm hoping to catch some parents that sleep trained and keep somewhat of a routine... My boys are 22 months old and have slept 12 hours straight through the night since 5 months old. No issues with waking, no regressions, no climbing out. They're each in their own crib in a shared room (but separate rooms for nap). Ummm I'm very terrified of moving to beds, but they're growing out of their mini cribs. I'm looking into separate floor beds and thinking of all the safety precautions. I guess my question is this: if your twins were sleep trained or at least had very consistent sleep (& nap), did that help with the transition to a bed??? Will they still be knocked out all night??? Will they still nap?? One twin is already shortening his nap by a lot. I'm very nervous!! Tell me it's gonna be alright!