If you’re not dealing with broadcast, and you’re simply uploading to YouTube, Vimeo, Facebook, etc. then I’ll save you some time. You don’t have to stick with 29.97 framerate. It’s old, it’s obsolete, it’s no longer technically relevant, shoot and play back at whatever framerate you like.
If you want to delve a little deeper into why 29.97fps is even a thing, check out this video from Matt Parker at Standup Maths. In it, he talks about how 30fps became 29.97fps in the first place. It basically boils down to a combination of the frequency of the electrical supply (60Hz) and the amount of broadcast “bandwidth” that was available to the first colour analogue TV signals.