Essays / The drinking age should be lowered or stay the same - starting a paragraph? [8]

My topic is Should the legal drinking age be lowered? I stand against this issue.

This is an argumentation essay and I do not know how to get started. I have to also debate the topic after the essay. Please any help will be appreciated. I am stuck on what points I need to make. I have several things that I would like to cite as well. Just getting started is a struggle for me.