Hey alaa11, I think it's good that you want to improve on your lines, but don't forget to also keep working on your head construction. You need to keep your features and proportions correct before you worry too much about your line quality. I did a quick draw over to show you how you can build the head properly, I hope this helps :)

here's another one :

thanks for the feedback everyone update : https://www.proko.com/community/topics/trying-to-improve-my-line any advice is appreciated

ok- first off- there's a lot charm in your lines right now, lots of personality to them. But you aren't wrong in feeling like you want to control them more, because there will be times where you need to. So here's an exercise for that. (see image)

Draw with intention. Draw with a concentrated effort to follow through with the line in one stroke and to use minimal lines. Just drawing with a pen will not help but it may help realize what lines are being put down and what are necessary.