I don't know.......personally, I had written a couple of rhymes back in the day but for me, I just pretty much started by ridin around in my homies cars drikin 32s of bud light with beats bumpin, takin turns droppin wack freestlyes lol. After a while I came across this site. Wrote a bunch of weak verses here. Kept writing. Kept freestyling. And now I can do both pretty well.
I dunno, I think it's good to learn to freestyle when you first start writin. I think it's good to get the feel of freestylin, spittin straight from the dome right at the beginning. Otherwise you might end up bein the cat in the cypher droppin hella pre written rhymes

* Plus free'n (when you start realizin that freestylin is all about letting you mind go blank and just lettin the words flow out) can help give you lots of new ideas for new flow. New rhythm. New rhyme patterns.
That's what I think...........but any path you take, I guarantee the constant key to getting good is practice, period.
Keep spittin, writin, and elevatin
Peace
*Please don't ever be that cat......that's straight up false advertising your skill........