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