If you want to meditate, I think it’s important to carefully examine what you’re being taught. Interestingly, the Headspace page indicates how many types of meditation there are out there (this is only a sampling!

https://www.headspace.com/meditation/techniques

Another good explanation of how mindfulness came from certain Buddhist techniques and blossomed into many, many therapies:

https://blogs.scientificamerican.com/guest-blog/what-does-mindfulness-meditation-do-to-your-brain/

A good example of the controversial and contradictory translations of the early Buddhist texts. It’s seems contradictory to me; Analayo spends much of the text explaining how the Buddha stresses memory and recollection and then threw all his proofs out in his conclusion! Still, a useful read:

https://link.springer.com/article/10.1007/s12671-017-0870-3