There's no single path to meditation. It doesn't have to even be still at all. Look at yoga, tai chi, dervishes. You don't even have to have a still mind at all times.

Yeah, eventually you want to get to that place of inner stillness, but that can be done while still having thoughts.

The key is to accept what's there and let it be. It'll go on its own given time and patience. Just keep breathing. If you want the body to relax, help it. Pick a different position until you find one that allows for the most relaxation, the least intrusive amount of body signals.

Your body aches, or twitches? Accept it. Observe it and move on. That tension is just as transient as the relaxed muscles. So don't hold on to it.

Keep trying, sometimes you will achieve your goal, sometimes you won't. Meditation isn't like sitting in a chair, it's more like balancing on one foot. You might have some early success and find it gets harder when you start trying to think about it. You wobble, you overcorrect rather than just putting your foot down and it feels like you are getting worse but you are just taking the first steps.

It isn't a race, you aren't flawed because you can't instantly master a new skill. Let go of the goal and just meditate to meditate.