i started going to buddhist sunday school when i was seven and went weekly for 7 years. my own choice, parents were supportive but nonreligious. so i learned a particular way of meditating very young. even did a few weekend-long meditation retreats when i was 13-14. it was wonderful, i only stopped because i started getting back issues during puberty that made it hard to sit straight for extended periods. posture is very important in shambhala buddhist meditation so i drifted away.
a few years ago i went to a manual therapist who had me do yogic breathing, which was intense as fuck and very different but also a form of meditation. i would literally be vibrating and unable to open my mouth beyond a little "o" by the end. crazy stuff.
don't know anything about headspace but stick with it i say.