It's okay, I sadly don't believe it will run BeamNG smoothly, but go ahead and give it try, if it doesn't work, then you can refund it. I suggest trying to build a desktop PC, like I did. I used a laptop similar to yours for 1-2 years to play BeamNG on, I could spawn in maybe 2 cars.
Of course. That's like asking if a 1993 Honda Civic is trash even though you know it's trash and if it can beat a Lamborghini. But I had to suffer with a horrible Asus X55A laptop for 3 years before building my current one so I know how you feel.