Mario kart 7 Iam getting my butt kicked

So no matter what I do I can not get 3 stars in 150cc flower cup I think it is.No matter what I try I can not get 3 stars and I know its only going to get worse for me so what did you do to make it bearable?

Howdy, god it seems no one came to help :cWithout idea of kart set up I'd go for acceleration builds with a lightweight, aim for control where you can and be sure to get all possible shortcuts by any means nessercary, took me a month to 3 star everything so I got a fair idea on what to do...practice makes perfect.