He doesn’t need to practise, because he’s already got all the skills he needs to be ahead of the game.

His music is so good, it gives you euphoria, and is super addictive, much like crack-cocaine.
This line may also be referencing the amount of money he makes on track after track.

To take CG down, you need something working in your favour.

He’s taking a dig at other rappers, saying that compared to him, nobody flows as well or as fluently.

He’s got a lot more to offer than the other rappers, because he is so different from the cliché of hip-hop altogether.

He’s someone everyone wants to be with,
He’s funny, smart, and he has a sick flow.
Not to mention he produces his own beats and writes all his own music.

There’s nothing wrong with CG, so he thinks he could be good with this girl that he’s courting.

As long as CG is going hard, and having fun, and his fans are happy, he doesn’t care if he wins awards.

However, he’s not giving up until either he takes it all, or he doesn’t finish.
This line may be an homage to fellow rapper Kid Rock, whom states in his song ‘Wasting time’,
“In it to win it like Yzerman,
Could drink about 15 Heinikeins”

He started with no rep in the rap game, so no matter how hard he fails, he’ll just be back at the beginning, nowhere to go but up.