Hello Gangaram,
To Master All areas in abap you can do an integrated project that will cover majority of the modules in ABAP,
Project: Create your own bus booking system
a. Design your own table for tracking availability and booking
b. Design a module pool screen to login and show the availability to the user
c. Once booking is done show an option to print a customized smartform.
4. Finally create an ALV report to show the amount of tickets sold based on selection parameters.
Regards
Selva