Hello Aspirant ,

Humanities and Social Science GATE 2021 will include various subjects such as Economics, English, Linguistics, Philosophy, Psychology and Sociology.There will be two sections for which you need to prepare. One is general aptitude  and the other is subject specific main section.You can easily prepare if you follow an organized study plan , Cover little by little on a daily basis , solve sample papers ,you can take up mock tests in some educational platforms , make use of the internet resource , if you search for apps or videos lesson I am sure you will get some .

Below are the subject-wise topics

Economics :

Microeconomics,Macroeconomics,Statistics, Econometrics and Mathematical Economics,International Economics,Public Economics,Development Economics,Indian Economy

English:

Multi-genre literature in English—poetry, the novel and other forms of fiction on the long 19th and 20th centuries,Anglophone and in English translation,Literary criticism and theory- critical and cultural intellectual-traditions and approaches ,History of English literature and English literary studies and Research approaches and methodologies.

Linguistics:

Language and Linguistics basics ,Levels of Grammar and Grammatical Analysis like phonetics ,morphology,syntax,semantics etc., Historical Linguistics,Socio-linguistics, Areal Typology, Universals, Cross-linguistic Features and Methods of analysis.

Sociology:

Classical Sociological theories like Emile Durkheim,Max Weber etc.,Structural-Functionalism and Structuralism,Hermeneutic and Interpretative Traditions,Post-Modernism, Post-Structuralism and Post-Colonialism,Conflict theory,Research methodology and methods,Sociological concepts,family , marriage ,kinship, Indian society,social movements and sociology of development.

Psychology :

Research Methods and Statistics,Psychometrics: Foundations of Psychological measurement,Biological psychology,Memory,Perception,Learning theories ,Cognition,Personality,Motivation theories,Emotion,Stress,Social psychology, Developmental psychology and application of psychology

Philosophy:

Classical Indian Philosophy,Contemporary Indian Philosophy,Classical and Modern Western Philosophy ,Metaphysics, Epistemology, Ethics, Social and Political Philosophy etc and Contemporary Western Philosophy.

This link will provide sample papers :

https://engineering.careers360.com/download/gate-sample-papers-previous-years?icn=GATE_sample_paper&ici=GATE_article_view_sticky

Hope this helps