Another tip for how to help you focus better when you're trying to learn something, this is specifically for, let's say, reading an article or a book or reading something from your screen is... interestingly, your mental focus follows your visual focus.
This is again based on some neuroscience principles.
The technique is that, let's say you've been reading this book, and then you notice...you know when you read words, and then you read like a paragraph, and you have no idea what you just read? But somehow you’ve been reading this whole time? This is when you're gonna use this technique.
What you want to do is start to focus your visual attention first.