Equipment and Software
All you need is the base game of Assetto Corsa to start no DLC is required. I recommend using Content Manger this is the quickest way to start, leave and menu in between races as you are able to bind keys to 'start race' and 'end race' which will set you back to the menu quicker as this is not an option in the base game on steam.
Download link for content manager: https://assettocorsa.club/content-manager.html
Most runners use steering wheels but this is not nessecery, a controller or even a keyboard can be used to participate but do keep in mind that the wheel is the fastest option.
Timing starts when you click on the picture/resume button and timing ends when you cross the finish line, this does vary in any% runs as your run might end half-way through a lap, as long as you hit the required points amount.
Internet connection is not required when completing runs. Send me a message if there is anything else you would like to know and I can add it to the guide.
Good Luck 🏎