www.themindfulcounselor.me/blog/meditate-with-adhd
https://www.themindfulcounselor.me/blog/do-you-have-to-sit-cross-legged-to-meditate
Ditch what you've been told about sitting cross-legged for twenty minutes and attempting for a "blank mind." That sentence alone was written by someone whose brain has only 17 tabs open at once.