i am big fan of need for speed world and i will show some simple steps to start career
when you go to buy a car dont choose any car , just buy the nissan silvia, it have great handling and good top speed , its the best car for the beginners
after you buy it don't spend your money on paint , body kits or anything else , just upgard the performance
then when you start racing, don't hit the other racers cars because that will damage your car and then you have to spend money to fix it, always have a clean race and try to finish first most of the time or be one of the top three
don't change your nissan silvia until level 15 , you can win with it all the 15 levels and more if you want but you will race against more powerful cars
if you rich level 15 dont buy any oldd muscle cars or any lexury cars just tuner cars , nissan gtr , bmw , . . . and don't buy the DODGE SRT8 its the worst one
follow this steps and you will figure the rest