Greetings aspirant!

Indian economy is considered one of the toughest subject.

• First of all it is very important to know the syllabus well and divide the topics as well as sub topics.
• Read and understand NCERT Class X Understanding Economic Development

NCERT Class XI Indian Economic Development
NCERT Class XII Macroeconomics
Daily Newspaper-any one standard Newspaper

• Solve questions on daily basis
• join coaching institute so that you can discuss your doubts with teachers and clear them.

Of you are preparing for economy paper for upsc, here's the syllabus for the same. https://competition.careers360.com/articles/ies-syllabus
https://competition.careers360.com/articles/books-for-upsc-ias

hope it helps.
thankyou!