Heyo! I'm definitely no expert or anything but I have some suggestions that I've been shown over the years in various English classes.
A good thing to start with is figuring out what side you want to take on the topic.
-Do I agree or disagree?
-Why do I feel this way? -> This can help create some of your arguments or ideas.
-What tone would I want to use? (Will I be confrontational? Passionate?)
-> Identifying the tone will set up how you should go about writing the speech/oral. For example, if you are going to be empathetic or emotional, you could include stories from children,or elderly that are very sick? And lots of exclusive language to position the reader to feel guilty. Lots of emotive language would work for your topic to really evoke sympathy within your audience...
-> You could be quite attacking on those that want it legalized or you could be the opposite - viewing euthanasia as a positive relief for those who are very ill..
-What is the purpose of my speech? -> Am I trying to push people to take action? If so what kind of actions?
-> Am I trying to introduce a law? or attack a certain audience (maybe the government in this case? For not legalizing etc)
** Here's a checklist my English teacher gave me, that you can use when writing or even planning your speech. If you did a google search, you'll find so many articles and statistics that you can use within your speech... I personally don't structure my oral presentations this way but it might help you to get a start! Goodluck
How to Structure a Persuasive Speech - Checklist
IntroductionWhat to include in your Introduction:
□ A brief background to the issue (where, when, how, why it has come up in the media)
□ Your contention
□ A list of your supporting arguments
Body ParagraphsWhat to include in each of your Body Paragraphs:
□ One argument per paragraph
□ Use TEEAL to structure each body paragraph
You should aim for 3 – 4 body paragraphs. One of these paragraphs might be a rebuttal paragraph – where you find an argument for the opposing side of your issue, and show how it isn’t valid.
Use your Research Notes to help you find what to include in your body paragraphs.
ConclusionWhat to include in your Conclusion:
□ Restate your contention
□ Briefly summarise your arguments