I think one way to view meditation is it’s a series of exercises aimed at becoming very sensitive. your body will naturally do what makes it feel better. by being sensitive enough to feel the cause of suffering (clinging) directly your body will naturally learn to do it less
I tentatively believe that people who want to “get into meditation” are probably better suited cleaning up diet and lifestyle first however they can, and also doing a ton of forgiveness meditation before worrying about anything like shamatha or vipassana. clearing out the system