even if you somehow did get better at rapping, you are trying to enter a dead genre. do yourself a favor and just shut up now and walk away with your tail between your legs before you realize you've invested that much time into something that wont provide any return besides hate from 14 year old newschoolers kids and the next button on peoples mp3 utilities. hip hop had to embrace this "I love haters" movement because thats all it has.
why dont you just stick to skiing and do some crazy shit like a flip up on an urban rail or something. everybody is sick of all your rap bullshit. you cant possibly contain a music career entirely built on a ski trick. stick to what you're good at.