Learning-wise, I’d say starting on PC makes much more sense. You’ll have a much easier time developing and debugging the game, as you can test right on the device you’re using to create the game. In terms of it being profitable, it’s very likely that your first game won’t be. I’d look at it as a learning experience first and foremost that will enable you to make profitable games in the future.
Meta devices no longer need a facebook account FYI. That requirement was scrapped over 2 years ago.