hey shalinee , how are you ?
now let me tell you how to start and you can decide for you :
macroeconomcics :Online course :: Standford very basic course . The notes attached are good
https://lagunita.stanford.edu/dashboard
Blanchard for macro is good but buy two books for macro : by Blanchard and by ben bernanke ( my friend got into dse last year followed , i did not took his advice :( )
also there is an online book library by bill gates call openstax there is one macro book for free .