How to improve handwriting?

Hello fellow addicts. I have been using fountain pens for over a year now, but despite how much I write my hand writing does not seem to be improving much. I don't like that such awesome pens are being used for such chicken scratch. So I was wondering what resources you guys have used to get better or learn to improve handwriting. Right now I write with non-cursive and honestly don't remember how to form most letters for cursive properly. So I have decided to get intentional and learn better handwriting and also learn cursive, and I was wondering where and how to start? Any help would be greatly appreciated.