'would it be better for learning'?
this question is pretty vague.
it is a fact that the heavier the disc, regardless of it's speed, the more it will tend to mask the thrower's technical throwing flaws. lighter discs also 'float' more and are much more interactive with the elements. that being said, the optimal disc would be the lightest one, assuming technical virtuosity is the learning goal. this approach creates problems of it's own, most importantly, many discs are not available in premium weights.
if one is learning 'form', i suggest practicing lots of throws in an open field with multiple examples of the same 'neutral' mold, probably a midrange or putter. you can also take that idea farther by using a faster disc, but the idea is to reduce variables while honing one's delivery - outside of the confines of an actual round of golf, where the overwhelming tendency is to want to score.
Some make a game of practice as well, scoring themselves for various other qualities of their throws or the consistent delivery of multiple throws in a row. In short, the 'fastest' way is immersion and repetition - get to 10K hours asap.
for what it's worth.