Going by this https://www.reddit.com/r/assettocorsa/comments/3xprtm/for_keyboard_players_what_are_your_settings/

and a coupla minutes on the practice track, mouse steering is the way to go. Needs a really light touch though, mostly fishtailing all over the place and managed to flip the car for a finale. Win!  :-O~~~

Next up: demolition derby!!!

hooray! Do check out the mods for the game, there are some really good ones.

But yes, at some point check out Flatout (1 and 2, not the rest of the sequels) and Wreckfest for all your amusing Destruction Derby needs. And Beam.Ng for all your amusing watching a regular car in a regular location experience dramatically kinetic consequences needs.