How to improve upon my hand on CAD. Basically from where to practice
What are the sites from where I could learn solidworks simulation part or other CAD softwares after learning Autocad and Solidworks
you have a section with tutorials... is a good start
and our best friend google and best teacher youtube :)
A lot of people use SolidProfessor.
Try to find a project that is close to your heart and do it until the end. To do this you will need to learn the features one by one. Solidworks answers the majority of practical questions in exercises directly inside the software. And Youtube is a gold mine.