How to handle a coma

Hi, im trying to write a story where the main character has to be unconscious for a long period of time (between 1-3 years). I then want them to wake up and have them be able to do stuff to progress the story. Is there any way to do this in a somewhat realistic way (obviously its okay if the character is still having trouble with stuff after they wake up, its just not really possible for them to do months of recovery stuff)?

If there isnt any way (which im assuming) how would i be able to adapt this into my story whilst still being somewhat faithful to reality. I dont need it to be 100% medically accurate but it would help to have it be as much as possible.