I want a VBAC delivery

Has anyone had a c section first time and gave birth vaginally the second? I’ve been on my doula search, and one told me that I should massage my c section ( I had a c-setion 6 years ago) scar everyday so that it’s not tight. How come no medical provider ever told me this? I even googled this and it said I should and it could reduce uterine rupture by up to 30-40%! I just still feel like I don’t know much about giving birth and trying to inform myself. I know that i don’t want any pain meds, very little medical intervention even though I want to give birth at the hospital. Just want to know if there’s any more information I am missing for the best chances of giving birth vaginally.