Firstly sorry for my English I am still learning
괜찮지 않아도 괜찮아
괜찮다 =To be ok
-지 않아 = make the verb negative "not.."
괜찮지 않아 = not ok , not good
-도 = even
괜찮지 않아도 = Even if you not ok or even if it is not ok
괜찮지 않아도 괜찮아 = it's ok even if you not ok ..even if you not ok , it's ok