You have a loooooong way to go. Keep at it if you're serious. Check out some other lyrics on here. Listen closely to different types of rhyme schemes, wordplay etc, when you listen to hip hop. This rhyme here is VERY basic. A simple rhyme scheme is cool if you have a strong grammatical form. But you've gotta draw the line somewhere, and rhymes like "flow, glow, mine, shine, wine, line, rhyme, dime" etc, just aren't gonna cut it if you don't at least have strong content, word choice and structure.
Like I said, keep at it and study lyricism to help build your understanding of it. Try different things as you pick up on them. Over time you'll build a stronger style if you're determined enough.