One of my best pieces of advice for friends and family wanting to improve their writing is... READ. 

Nothing helps you internalize story structure, dialogue, and character arc like immersing yourself regularly in novels. 

So, if you really want to write better, spend some time every day reading. Permission to put down the phone. Power down the laptop.  Turn off the t.v.  AND JUST READ INSTEAD.   

If you need some ideas for books, https://bookshop.org/shop/ginahandley.