Can I do simple meditation even if I don’t believe in spirituality?

Aman, your Sagittarius Sun is usually spiritual, but your specific planetary placement suggests a "Logical/Rational" bent. You need proof and results. The Detailed Solution: Meditation is a Biological Tool, not just a spiritual one. You can call it "Mental Hygiene." Just as you brush your teeth to remove plaque, you meditate to remove "Cognitive Plaque." Focus on the Science of the Breath: how Oxygen affects your Brain Chemistry. You don't need to believe in anything other than your own lungs and brain. The Remedy: ● Exercise: Use a fitness tracker to see your Heart Rate Drop during meditation; the data will convince your logical mind. ● Blue Color: Use Navy Blue in your surroundings to support your intellectual and calm approach.