This is the 53rd talk I've given in the past 5 years. If you think you can't do even one conference talk. I'm here to tell you that you are wrong. First, why would anyone give a talk? You personally benefit from speaking because you make new friends, it builds your portfolio, and it lets you get the word out about changes that you want to see in the tech world. Your company benefits because your good talk is good for its reputation and its name on your badge is free advertising. The conference benefits from you submitting to speak even if you're not selected because the more options the papers committee has to choose from, the better a schedule they can build. If you want that, here's how. "What should I say" and "where should I say it" are the same question. The best talk for you to give is at the intersection of what you know, what the conference needs, and what the audience wants to hear. You might have heard how the easiest trick to getting a bestselling book online is to publish in the intersection of two categories with very little overlap. Talks can be the same -- if you've got two disciplines that you're just average at, you can be the best in the world at their intersection if nobody else is doing it. So you've got some topic ideas. Next, find some conferences you want to attend, from their dates and locations and themes and the communities they build. Write a talk abstract that gives context to your idea and asks the questions that your talk will answer. Submit it a lot and you'll get rejected a lot. But keep those rejections with pride because each one represents a time you dodged a bullet. Each rejection is a time that a committee helped avoid ending up in front of an empty room or a room full of people who weren't interested in what you had to say. Keep applying and you'll eventually get accepted and then you get to write the rest of your talk. There are a bunch of do's and don't's about telling your talk's story and they're all well docuented online. Just practice a bunch and get feedback from people like your audience and listen to your own recordings, even though it's miserable because everyone sounds funny to themself. You get to the conference and you give the talk just like you practiced. Then somebody asks you a question that you don't know the answer to yet, because you are smart enough to pull that talk off but still dumb enough to try. It's terrifying because you think they'll find out how little you know and you just want to crawl back to your room and check the docs for the answer... But that's your answer right there, you tell them where you'd look to find the fact they asked you for, and answers their question by solving the underlying problem of their not knowing how to find out. And everybody who had the same questions as your abstract and came to your talk has learned something because you delivered on its promises, and so you've done that thing you set out to and everybody cheers.