My left hand and right hand lines are very different from each other. I don't know what M means on the palm.
Do you any other sign on your palm like lotus, conch ,star ,fish , square,triangle or temple etc?
A psychic once told me, flat out, that I was meant to be a journalist. Even better, a palm reader confirmed my unhappiness in a prior career when I secretly yearned to be a freelance writer. Coincidence? Perhaps. But if you’ve ever had a palm reading done, you know how intriguing it is to think that our hands hold a wealth of knowledge about the past, present and future. According to some sources, an M on your palm means you have the potential to unlock special qualities
https://www.thealternativedaily.com/meaning-of-m-on-palm/