how to go up without taking damage?

[Phonkツ]

not from mobs, i mean the dmg you take randomly, how do i prevent that?

[Ruby.exe]

Play the game, talk to NPCs and they teach you things as long as you read the dialogue

[The AntQueen]

To give a more detailed answer, after you die 2-ish times after going up, a character should give you an invocation you can perform to deal with it.

[JinxTheWorld]

You are meant to fail, and the story progression is tied to it.