hahaha! kash hamary siasatdano ko bhe un k walidain pithai kar kar k set karty...
English lines k paper sheets per ache practice ho skti hay, jub practice ho jae tu plane sheets use krleni chahye

gameface has given very good suggestion.. it's quick to learn and improve..

someone with good hand-writing can write top single line of the page, you can follow his/her style on remaining lines of the page.. practice it for fifty to hundred pages at least, you'll see a lot of improvement..

If you want to improve the strokes of English writing then I'd suggest that visit some of the scripts by some personalities. Observe which one's easier and closer for you to follow. Then following the strokes from that script, write a paragraph daily with pencil for about a week, then with ink pen for the next week and then with ball point in third week. In fourth week, repeat this with pencil, ink pen and ball point altogether. After a month, you'll be able to write anything with any medium (either with pencil, ink pen or ball point) in your chosen style of writing.

Goodluck! :)