Assalam Alaikum friends.

I am planing to start preparation for my essays from now onwards but I am confuse that how much essay should i Write for example that I know the essays are amidst the following topic

1) Literature Related
2) Philosophy
3) International Politics
4) Economics related
5) Social issues
6) Religious issues

so how should I proceed with the following topics ?
should I pick each topic and write 2 to 3 essays on each ? or how should I manage to start writing and practicing my essay ?