HOW DO I FIX THIS KEYBOARD ISSUE ON XBOX ONE

Before anyone tells me ‘its old, just update your xbox, its not expensive’, yes, I know, but I really have no money, and im already saving up for a handful of other more important things. I’ve got a ps4 so if this really doesn’t work, i’ll just accept my fate and move on to that.

My controller is fine. It’s on full batteries, and I even switched controllers to see if the problem lies solely in the controller, which i’ve concluded it doesn’t.

As you can see in the video, whenever I try to choose a letter in the keyboard, it throws me back to the recommendation bar (or whatever it’s called). I searched all around the settings like a crazy person only to discover that you can’t really choose many preferences, not even the speed of the controller. You can only ‘experiment’ with the buttons (along other useless things).

Does anybody have an idea what I could do to fix this? Your help is extremely appreciated.