writing can be learned !
unfortunately most k12 and even unis do not teach writing at all
they focus on low level grammar and proofreading
@ostarella will vehemently disagree but the best way to learn to write is to learn how to organise and think logically
@robjvargas will try to censor me because he disagrees too and because he at cant stand any opinion that disagrees with his beliefs
read books on how to organise your thoughts
read books on how to architect a plot
and then hone your skills with practice
what is sure is that aimless writing without knowing HOW to write will only lead to frustration
use a template to help you plot
consider dramatica pro or similar guide to help fill in the details of the plot
consider other tools to help you keep your thoughts organised
outline4D is one choice. some folks like scrivener. or do it with paper and pencil if you prefer but whatever do plan and organise before you write.