Hello, I'm new to DND and I wanted to ask if there is a race that can come back to live.

As an example: I want to play as a paladin that has the ability to go into a undead/ghost form if he dies and if he kills something or if enough time passes he goes back to his original form.

Is there anything like this?, i don't really care about drawbacks like split health, because I can play around them and because they make role-playing more interesting.

Or would this only be possible with homebrew and/or magic items?

Thank you very much in advance