I started with the most basic guided meditations almost 30 years ago. Next step, learn to focus on a candle or a dot on the wall without thinking about anything else. Increase the time to hold this focus. It should be a "relaxed focus"; when your head turns read or wrinkly, it's wrong.
From there, it can go to really emptying your head. Thoughts will come up, but think of them like something external that you can observe, you see the thought, you aren't the thought. Same with feelings, in my case, especially that I have to stop and get up. I see the urge to jump up, but I am not the urge.
Imagination can help at an early stage, like: I'm this scaffold full of gaps where thoughts and emotions just pass through like a smoke cloud without affecting it. But it's supposed to go to a point where even that is considered a thought that should pass.
Effects are great in many areas of life: Dreaming, sleep, notice needs like sleep or hunger or thirst before they become overwhelming. Studying and retaining the information.
Yet still, I surprisingly manage to drop the habit for a day, weeks, even years at times.
My most stupid reason is: There is a lot to do / I need to get to bed right now, so there is no time for even 5 minutes of meditation. (But there was time to browse Reddit for let's-not-say-how-many-minutes, "research" the making of for a movie I don't even like etc.) Yet that argument seems quite compelling in the moment.
Interesting insight! I travelled the same road in the other direction. As someone who loves science, I always saw my role as a patient to just report symptoms and let the doctors do their thing. And I'm sure this would be the ideal approach if everybody had the House M.D. team on their case.
But after decades of this failing, I realised that this method does not work with a real-world medical system where doctors have more bias than they should, work with methods from their studying days that assumed they had more time and resources per case, and wrong monetary incentives.
So Method 1: I say I have X, and make it clear that I'll be a PITA if their test doesn't confirm it. If there were no bias, there would be no harm to this, but if there is, it's working to my advantage now.
Method 2: Just think of them as the idiot who is clueless but gatekeeper of the much wanted prescription.
Nobody wants to hear this, but a layman's web research, LLM and 1000 hours of thinking often beats 10 years of medical training if the doctor interrupts the patient after 20 seconds and only thinks about the case for 5 minutes. (With 30 minutes, my money would be back on the trained professional, but nobody has 30 minutes.) A patient can also fixate on a premature assumption just like a doctor can, but my very subjective experience is that doctors are more prone to that.