Firstly, this isn't a very well formed question. If you're really interested in meditation and are looking for a reason to do it, learn more about different types of meditation and their associated goals. Then re-ask your specific needs so internal explorers can help you more efficiently on your quest. We’re travelling that path and know what it means to get helpful input! So, here’s me answering the question from multiple methods / perspectives...

Stillness
The first time I attempted standing totally still for five minutes my body was wracked with agony. I found that my neuromuscular system was in complete revolt. Then it fell away. I wasn't watching a clock so I can't tell when exactly the insanity subsided, but when the internal lightning of angry receptors decided to take a break, the MELT of tension and nervous motion took a decided decline.

After breaking the barrier of nervous system revolt, the next target of 10 minutes wasn't as wild. The time was filled with noticing micro-insurrections that didn’t quite grow to significance.

Fifteen minutes of trying to be completely still (while standing) was another challenge, but nothing like that first encounter with my body trying to quell all efforts of stillness. Calm was almost a thing and after the fact my body didn’t feel as lost or spent as it did when I first approached the five minute mark.

Changes: My body does my bidding more effectively and I can hear its complaints more effectively.

Thinking / Not-Thinking

Learning to Not-Think is a curious dichotomy.

You can definitely do it. I think.

That's part of the problem.

My experience with letting go of thought has not been an absence of thought.

Every well experienced meditator I have spoken to about “quieting the mind” laughs the same way I do based on my experience.
…that’s such HORRIBLE advice for someone beginning to meditate.

Thinking happens.

Redirect it to goal.

eagle42