First, meditation is something you practice, not read about. Reading about meditation is as useful as watching pro sports.
Why meditate in the first place? There are a lot of good sites on line. Live and Dare has a good article on the benefits of meditation at https://liveanddare.com/benefits-of-meditation/.
I might well mention the items from Wildmind and other sources like https://www.chriswinfield.com/meditation-hacks. there’s and interesting list of types of meditation at https://mentalhealthdaily.com/2015/03/24/types-of-meditation-extensive-list-of-techniques/.
Finally, to get started on meditation, try 20/20 Meditate for peace by Michelle Zarrin Introduction at https://insighttimer.com/michellezarrin/guided-meditations/20-slash-0.