The only answer is to work hard. Make a note book & write at least one page daily. Any thing or from your book.
Practice makes a man perfect.
If it will not work you can buy a sample note book from the market. Where the words are given on the first line.
You look at them and try to follow them accordingly.
Inshallah within a few months you will get your target. For Urdu writing workbook called “khush-khati’ is also available.