I'm ok at freestyling now... Start off rhyming simple words...

Line, Rhyme, Time, Shine...

It's hard enough to put shit people wan't to hear in between the rhymes, to start rhyming hard words... Keep doing that (not always the same rhymes) and soon you will be able to expand your rhyming... Even multies will start coming to you quick as fuck, at least they do for me