imo, you should try reaching lvl 100 ultimate on softcore 1st with a decent build at least.
because in gd, there are several bosses/heroes that can jumpscare you out of nowhere (either with ambush or sudden special moves) and then one shot you with SINGLE STRIKE/SNIPE/METEOR/SHOTGUN/VOLCANO UNDER YOUR REAR/STACKS UPON STACKS OFF DOTs. these sudden damage spike moves can only be countered IF you know what’s their damage type, and already prepare your resistances, health and da for that (also knowing their pattern and how to kite them really helps). having good adcth and some instant defense/heal panic buttons also helps a lot.
after you understand how to deal with enemies that can cause potential one shot jumpscare of sudden death, you can go hc safely. it is mandatory to read the guides/tutorial section on this forum (or other official gd forums) to understand the gameplay mechanics of gd and how to make viable builds.