theres probably many ways one can improve their writing, but id say one of the best and most rewarding would be to find someone you trust and see if they'll give you honest feedback. See if they can tell you:

• how what you wrote made you feel
• whether they think they 'got' what it is you were trying to say
• what they liked/disliked

Then compare what they tell you with what your expectation was. Rinse and repeat.