How can I make my Frankenstein like OC

Ok so basically my friends is doing A darker kind of campaign he wanted all of us to play one of the original monsters like the invisible Man creature of the Black lagoon Dracula werewolf guy that kind of thing and I chose Frankenstein as mine my DM wanted us to like make it our own though and I like to play healer based characters so is that way I can play as a Frankenstein like character Indian deep that does healing and maybe I don't know if this is in dnd but I think grafting would be really cool