How to study...

I'm a second year student.... 17 ... In the first ... I was good at studies .... But after my depression issues... I fell off in my studies... I was unable to study ... And this yr was my board.... It's gonna be super tough.... I'm getting scared of my studies...... I don't know how to study.... I even haven't took my classes.. due to my depression issues.... I stayed at my home for 6 months.... I just... Want to study...... But I was unable to.....