Type of essay:
--> Persuasive Essay for sure. Since your topic is "Books should be banned" it's makes sense that you'd be trying to convince why they should be banned.
Persuasive essays are much different than argumentative essays. Argumentative uses only facts. Whereas persuasive uses opinions of the writer.
Some steps you could take are:
--> Prewrite. (So always have an idea of what exactly you wanna have the essay sound before you start.)
--> Research. (Once you've decided the topics and ideas you'll state then you must research some facts to back up your claims. Also use your opinions. It is your essay after all. Put your heart and soul into it to convince the readers.)
--> Make it interesting. (You have to have the readers engaged and happy to read. Grab their attention so they will read the whole thing to the end.)
--> After you finish your rough draft make sure to revise. (I recommend Grammarly to help you make the essay better.)
--> Last step is probably the most important. The conclusion. (Make sure to wrap up all the ideas to leave a refreshing ending to the essay.)