“I have to go in and change from 24 fps to 29.97 fps every time I create a new project” No
You can open Davinci Resolve – New Project – maybe call it: Default 29,97 fps – make the change to 29.97 fps in Resolve – then go to File – Save Project !
Next time you open Davinci Resolve – choose “Default 29,97 fps” project ! Start your work – and go to File – Save Project As – giv your project another name – next time again you will still have your “Default 29,97 fps” project when you open Davinci Resolve !