Hi Daniyal,
your laptop should be able to handle modeling in blender without any problems, you can try to:
1- make sure your graphics driver is up to date
2- reset blender to factory settings by going to File > Defaults > Load factory settings
reseting blender to factory settings will disable any addons you have, if it fixes your issue, than it might be an addon that’s causing the lag.
If that doesn’t help, check your task manager to see your system resources, maybe another program is using a lot of resources.