I disagree with the notion that meditation is not a Jewish thing. Well I don’t really disagree with it per se, but with its implications.
Meditation is as much a Jewish thing as eating apples or doing exercise. It is a tool for life. If it speaks to you, doesn’t hurt anyone, and isn’t bad in God’s eyes (stuff Halacha defines), then it can be utilized for personal growth. As the popular idiom goes, whatever floats your boat. God wants you to be yourself; not someone else, and certainly not a robot. So if meditation speaks to you, then using it for personal growth is most certainly a Jewish thing.