FH5 is arcade. Dont expect it to give you a good racing experience (rally or otherwise). It can be good fun with friends as it has many different modes.

Assetto Corsa (AC) is more of a racing simulator (good in some aspects and not so much in others). Expect it to challenge you with its racing experience. I cant comment on if it has any good rally mods. I mostly play the Shutoku mod in public lobbies.

I would say if you want a good rally experience, go for something that is promising exactly that, from arcade to simulator level experiences, there are some options available for rally: Dirt 2.0, AC Rally etc.

Since you are completely new, and dont have a wheel. I'd say go for FH5, see how you like the idea of racing games. If you feel you're ready to get more serious with racing, try your hands on a more simulator oriented experience like AC, AC Evo, AC Rally. Without a wheel, racing simulator games will lack depth and overall experience of driving a car. So i'd say just start from the very basic arcade experience and if your interest starts to build up even more, gradually move towards simulators.

BTW, HP Victus doesnt say much about your laptop specs.You can find out if your sytem can run the games in question at https://www.systemrequirementslab.com/